[MINOR] Bump version to 0.8.0-incubating-SNAPSHOT for master branch

Author: jerryshao <jerryshao@tencent.com>

Closes #264 from jerryshao/bump-version.
diff --git a/api/pom.xml b/api/pom.xml
index f66e82a..9c51619 100644
--- a/api/pom.xml
+++ b/api/pom.xml
@@ -20,12 +20,12 @@
   <parent>
     <groupId>org.apache.livy</groupId>
     <artifactId>livy-main</artifactId>
-    <version>0.7.0-incubating-SNAPSHOT</version>
+    <version>0.8.0-incubating-SNAPSHOT</version>
   </parent>
 
   <groupId>org.apache.livy</groupId>
   <artifactId>livy-api</artifactId>
-  <version>0.7.0-incubating-SNAPSHOT</version>
+  <version>0.8.0-incubating-SNAPSHOT</version>
   <packaging>jar</packaging>
 
   <properties>
diff --git a/assembly/pom.xml b/assembly/pom.xml
index c0d0b26..a9262c5 100644
--- a/assembly/pom.xml
+++ b/assembly/pom.xml
@@ -20,12 +20,12 @@
   <parent>
     <groupId>org.apache.livy</groupId>
     <artifactId>livy-main</artifactId>
-    <version>0.7.0-incubating-SNAPSHOT</version>
+    <version>0.8.0-incubating-SNAPSHOT</version>
     <relativePath>../pom.xml</relativePath>
   </parent>
 
   <artifactId>livy-assembly</artifactId>
-  <version>0.7.0-incubating-SNAPSHOT</version>
+  <version>0.8.0-incubating-SNAPSHOT</version>
   <packaging>pom</packaging>
 
   <properties>
diff --git a/client-common/pom.xml b/client-common/pom.xml
index 0d9a27e..6511b49 100644
--- a/client-common/pom.xml
+++ b/client-common/pom.xml
@@ -20,12 +20,12 @@
   <parent>
     <groupId>org.apache.livy</groupId>
     <artifactId>livy-main</artifactId>
-    <version>0.7.0-incubating-SNAPSHOT</version>
+    <version>0.8.0-incubating-SNAPSHOT</version>
   </parent>
 
   <groupId>org.apache.livy</groupId>
   <artifactId>livy-client-common</artifactId>
-  <version>0.7.0-incubating-SNAPSHOT</version>
+  <version>0.8.0-incubating-SNAPSHOT</version>
   <packaging>jar</packaging>
 
   <dependencies>
diff --git a/client-http/pom.xml b/client-http/pom.xml
index 8401950..a827076 100644
--- a/client-http/pom.xml
+++ b/client-http/pom.xml
@@ -20,12 +20,12 @@
   <parent>
     <groupId>org.apache.livy</groupId>
     <artifactId>livy-main</artifactId>
-    <version>0.7.0-incubating-SNAPSHOT</version>
+    <version>0.8.0-incubating-SNAPSHOT</version>
   </parent>
 
   <groupId>org.apache.livy</groupId>
   <artifactId>livy-client-http</artifactId>
-  <version>0.7.0-incubating-SNAPSHOT</version>
+  <version>0.8.0-incubating-SNAPSHOT</version>
   <packaging>jar</packaging>
 
   <dependencies>
diff --git a/core/pom.xml b/core/pom.xml
index 6179a7a..5db4cc8 100644
--- a/core/pom.xml
+++ b/core/pom.xml
@@ -22,12 +22,12 @@
   <parent>
     <groupId>org.apache.livy</groupId>
     <artifactId>multi-scala-project-root</artifactId>
-    <version>0.7.0-incubating-SNAPSHOT</version>
+    <version>0.8.0-incubating-SNAPSHOT</version>
     <relativePath>../scala/pom.xml</relativePath>
   </parent>
 
   <artifactId>livy-core-parent</artifactId>
-  <version>0.7.0-incubating-SNAPSHOT</version>
+  <version>0.8.0-incubating-SNAPSHOT</version>
   <packaging>pom</packaging>
 
   <dependencies>
diff --git a/core/scala-2.11/pom.xml b/core/scala-2.11/pom.xml
index 417f2e2..247f1d1 100644
--- a/core/scala-2.11/pom.xml
+++ b/core/scala-2.11/pom.xml
@@ -19,13 +19,13 @@
   <modelVersion>4.0.0</modelVersion>
   <groupId>org.apache.livy</groupId>
   <artifactId>livy-core_2.11</artifactId>
-  <version>0.7.0-incubating-SNAPSHOT</version>
+  <version>0.8.0-incubating-SNAPSHOT</version>
   <packaging>jar</packaging>
 
   <parent>
     <groupId>org.apache.livy</groupId>
     <artifactId>livy-core-parent</artifactId>
-    <version>0.7.0-incubating-SNAPSHOT</version>
+    <version>0.8.0-incubating-SNAPSHOT</version>
     <relativePath>../pom.xml</relativePath>
   </parent>
 
diff --git a/coverage/pom.xml b/coverage/pom.xml
index 3887965..cfd7ae1 100644
--- a/coverage/pom.xml
+++ b/coverage/pom.xml
@@ -23,11 +23,11 @@
     <groupId>org.apache.livy</groupId>
     <artifactId>livy-main</artifactId>
     <relativePath>../pom.xml</relativePath>
-    <version>0.7.0-incubating-SNAPSHOT</version>
+    <version>0.8.0-incubating-SNAPSHOT</version>
   </parent>
 
   <artifactId>livy-coverage-report</artifactId>
-  <version>0.7.0-incubating-SNAPSHOT</version>
+  <version>0.8.0-incubating-SNAPSHOT</version>
   <packaging>pom</packaging>
 
   <dependencies>
diff --git a/examples/pom.xml b/examples/pom.xml
index 75300d4..400969a 100644
--- a/examples/pom.xml
+++ b/examples/pom.xml
@@ -23,13 +23,13 @@
   <parent>
     <groupId>org.apache.livy</groupId>
     <artifactId>livy-main</artifactId>
-    <version>0.7.0-incubating-SNAPSHOT</version>
+    <version>0.8.0-incubating-SNAPSHOT</version>
     <relativePath>../pom.xml</relativePath>
   </parent>
 
   <groupId>org.apache.livy</groupId>
   <artifactId>livy-examples</artifactId>
-  <version>0.7.0-incubating-SNAPSHOT</version>
+  <version>0.8.0-incubating-SNAPSHOT</version>
   <packaging>jar</packaging>
 
   <properties>
diff --git a/integration-test/pom.xml b/integration-test/pom.xml
index 6736f20..e617d9a 100644
--- a/integration-test/pom.xml
+++ b/integration-test/pom.xml
@@ -23,11 +23,11 @@
     <groupId>org.apache.livy</groupId>
     <artifactId>livy-main</artifactId>
     <relativePath>../pom.xml</relativePath>
-    <version>0.7.0-incubating-SNAPSHOT</version>
+    <version>0.8.0-incubating-SNAPSHOT</version>
   </parent>
 
   <artifactId>livy-integration-test</artifactId>
-  <version>0.7.0-incubating-SNAPSHOT</version>
+  <version>0.8.0-incubating-SNAPSHOT</version>
   <packaging>jar</packaging>
 
   <properties>
diff --git a/pom.xml b/pom.xml
index ef8e6e7..c9391f5 100644
--- a/pom.xml
+++ b/pom.xml
@@ -22,7 +22,7 @@
 
   <groupId>org.apache.livy</groupId>
   <artifactId>livy-main</artifactId>
-  <version>0.7.0-incubating-SNAPSHOT</version>
+  <version>0.8.0-incubating-SNAPSHOT</version>
   <packaging>pom</packaging>
   <name>Livy Project Parent POM</name>
   <description>Livy Project</description>
diff --git a/python-api/pom.xml b/python-api/pom.xml
index ce60fb0..8e5cdab 100644
--- a/python-api/pom.xml
+++ b/python-api/pom.xml
@@ -23,13 +23,13 @@
   <parent>
     <groupId>org.apache.livy</groupId>
     <artifactId>livy-main</artifactId>
-    <version>0.7.0-incubating-SNAPSHOT</version>
+    <version>0.8.0-incubating-SNAPSHOT</version>
     <relativePath>../pom.xml</relativePath>
   </parent>
 
   <groupId>org.apache.livy</groupId>
   <artifactId>livy-python-api</artifactId>
-  <version>0.7.0-incubating-SNAPSHOT</version>
+  <version>0.8.0-incubating-SNAPSHOT</version>
   <packaging>pom</packaging>
 
   <build>
diff --git a/python-api/setup.py b/python-api/setup.py
index 750972e..3eeb323 100644
--- a/python-api/setup.py
+++ b/python-api/setup.py
@@ -39,7 +39,7 @@
 
 setup(
     name='livy-python-api',
-    version="0.7.0-incubating-SNAPSHOT",
+    version="0.8.0-incubating-SNAPSHOT",
     packages=["livy", "livy-tests"],
     package_dir={
         "": "src/main/python",
diff --git a/repl/pom.xml b/repl/pom.xml
index 82267c0..4afd548 100644
--- a/repl/pom.xml
+++ b/repl/pom.xml
@@ -23,11 +23,11 @@
     <groupId>org.apache.livy</groupId>
     <artifactId>multi-scala-project-root</artifactId>
     <relativePath>../scala/pom.xml</relativePath>
-    <version>0.7.0-incubating-SNAPSHOT</version>
+    <version>0.8.0-incubating-SNAPSHOT</version>
   </parent>
 
   <artifactId>livy-repl-parent</artifactId>
-  <version>0.7.0-incubating-SNAPSHOT</version>
+  <version>0.8.0-incubating-SNAPSHOT</version>
   <packaging>pom</packaging>
 
   <dependencies>
diff --git a/repl/scala-2.11/pom.xml b/repl/scala-2.11/pom.xml
index e47db03..020b842 100644
--- a/repl/scala-2.11/pom.xml
+++ b/repl/scala-2.11/pom.xml
@@ -21,13 +21,13 @@
   <modelVersion>4.0.0</modelVersion>
   <groupId>org.apache.livy</groupId>
   <artifactId>livy-repl_2.11</artifactId>
-  <version>0.7.0-incubating-SNAPSHOT</version>
+  <version>0.8.0-incubating-SNAPSHOT</version>
   <packaging>jar</packaging>
 
   <parent>
     <groupId>org.apache.livy</groupId>
     <artifactId>livy-repl-parent</artifactId>
-    <version>0.7.0-incubating-SNAPSHOT</version>
+    <version>0.8.0-incubating-SNAPSHOT</version>
     <relativePath>../pom.xml</relativePath>
   </parent>
 
diff --git a/rsc/pom.xml b/rsc/pom.xml
index 1f3d6a3..074197f 100644
--- a/rsc/pom.xml
+++ b/rsc/pom.xml
@@ -21,7 +21,7 @@
   <parent>
     <groupId>org.apache.livy</groupId>
     <artifactId>livy-main</artifactId>
-    <version>0.7.0-incubating-SNAPSHOT</version>
+    <version>0.8.0-incubating-SNAPSHOT</version>
     <relativePath>../pom.xml</relativePath>
   </parent>
 
diff --git a/scala-api/pom.xml b/scala-api/pom.xml
index 1fb3c70..4963dc7 100644
--- a/scala-api/pom.xml
+++ b/scala-api/pom.xml
@@ -23,12 +23,12 @@
   <parent>
     <groupId>org.apache.livy</groupId>
     <artifactId>multi-scala-project-root</artifactId>
-    <version>0.7.0-incubating-SNAPSHOT</version>
+    <version>0.8.0-incubating-SNAPSHOT</version>
     <relativePath>../scala/pom.xml</relativePath>
   </parent>
 
   <artifactId>livy-scala-api-parent</artifactId>
-  <version>0.7.0-incubating-SNAPSHOT</version>
+  <version>0.8.0-incubating-SNAPSHOT</version>
   <packaging>pom</packaging>
 
   <dependencies>
diff --git a/scala-api/scala-2.11/pom.xml b/scala-api/scala-2.11/pom.xml
index b21b603..e06b7f2 100644
--- a/scala-api/scala-2.11/pom.xml
+++ b/scala-api/scala-2.11/pom.xml
@@ -19,13 +19,13 @@
   <modelVersion>4.0.0</modelVersion>
   <groupId>org.apache.livy</groupId>
   <artifactId>livy-scala-api_2.11</artifactId>
-  <version>0.7.0-incubating-SNAPSHOT</version>
+  <version>0.8.0-incubating-SNAPSHOT</version>
   <packaging>jar</packaging>
 
   <parent>
     <groupId>org.apache.livy</groupId>
     <artifactId>livy-scala-api-parent</artifactId>
-    <version>0.7.0-incubating-SNAPSHOT</version>
+    <version>0.8.0-incubating-SNAPSHOT</version>
     <relativePath>../pom.xml</relativePath>
   </parent>
 
diff --git a/scala/pom.xml b/scala/pom.xml
index 658446b..4f130bb 100644
--- a/scala/pom.xml
+++ b/scala/pom.xml
@@ -21,13 +21,13 @@
   <modelVersion>4.0.0</modelVersion>
   <groupId>org.apache.livy</groupId>
   <artifactId>multi-scala-project-root</artifactId>
-  <version>0.7.0-incubating-SNAPSHOT</version>
+  <version>0.8.0-incubating-SNAPSHOT</version>
   <packaging>pom</packaging>
 
   <parent>
     <groupId>org.apache.livy</groupId>
     <artifactId>livy-main</artifactId>
-    <version>0.7.0-incubating-SNAPSHOT</version>
+    <version>0.8.0-incubating-SNAPSHOT</version>
     <relativePath>../pom.xml</relativePath>
   </parent>
 
diff --git a/server/pom.xml b/server/pom.xml
index 65e46a1..bca1853 100644
--- a/server/pom.xml
+++ b/server/pom.xml
@@ -23,11 +23,11 @@
     <groupId>org.apache.livy</groupId>
     <artifactId>livy-main</artifactId>
     <relativePath>../pom.xml</relativePath>
-    <version>0.7.0-incubating-SNAPSHOT</version>
+    <version>0.8.0-incubating-SNAPSHOT</version>
   </parent>
 
   <artifactId>livy-server</artifactId>
-  <version>0.7.0-incubating-SNAPSHOT</version>
+  <version>0.8.0-incubating-SNAPSHOT</version>
   <packaging>jar</packaging>
 
   <dependencies>
diff --git a/test-lib/pom.xml b/test-lib/pom.xml
index d0fe00d..0968f6e 100644
--- a/test-lib/pom.xml
+++ b/test-lib/pom.xml
@@ -20,12 +20,12 @@
   <parent>
     <groupId>org.apache.livy</groupId>
     <artifactId>livy-main</artifactId>
-    <version>0.7.0-incubating-SNAPSHOT</version>
+    <version>0.8.0-incubating-SNAPSHOT</version>
   </parent>
 
   <groupId>org.apache.livy</groupId>
   <artifactId>livy-test-lib</artifactId>
-  <version>0.7.0-incubating-SNAPSHOT</version>
+  <version>0.8.0-incubating-SNAPSHOT</version>
   <packaging>jar</packaging>
 
   <properties>
diff --git a/thriftserver/client/pom.xml b/thriftserver/client/pom.xml
index 757953d..2887a33 100644
--- a/thriftserver/client/pom.xml
+++ b/thriftserver/client/pom.xml
@@ -21,7 +21,7 @@
   <parent>
     <artifactId>livy-main</artifactId>
     <groupId>org.apache.livy</groupId>
-    <version>0.7.0-incubating-SNAPSHOT</version>
+    <version>0.8.0-incubating-SNAPSHOT</version>
     <relativePath>../../pom.xml</relativePath>
   </parent>
   <modelVersion>4.0.0</modelVersion>
diff --git a/thriftserver/server/pom.xml b/thriftserver/server/pom.xml
index f533fc0..dccb59f 100644
--- a/thriftserver/server/pom.xml
+++ b/thriftserver/server/pom.xml
@@ -22,7 +22,7 @@
   <parent>
     <artifactId>livy-main</artifactId>
     <groupId>org.apache.livy</groupId>
-    <version>0.7.0-incubating-SNAPSHOT</version>
+    <version>0.8.0-incubating-SNAPSHOT</version>
     <relativePath>../../pom.xml</relativePath>
   </parent>
 
diff --git a/thriftserver/session/pom.xml b/thriftserver/session/pom.xml
index 576722b..8797d1d 100644
--- a/thriftserver/session/pom.xml
+++ b/thriftserver/session/pom.xml
@@ -22,7 +22,7 @@
   <parent>
     <groupId>org.apache.livy</groupId>
     <artifactId>livy-main</artifactId>
-    <version>0.7.0-incubating-SNAPSHOT</version>
+    <version>0.8.0-incubating-SNAPSHOT</version>
     <relativePath>../../pom.xml</relativePath>
   </parent>