Prepare for releasing 0.13.0
diff --git a/pom.xml b/pom.xml
index 45aa64d..0e949ad 100644
--- a/pom.xml
+++ b/pom.xml
@@ -29,7 +29,7 @@
 
     <groupId>org.apache.twill</groupId>
     <artifactId>twill-parent</artifactId>
-    <version>0.13.0-SNAPSHOT</version>
+    <version>0.13.0</version>
     <packaging>pom</packaging>
     <name>Apache Twill</name>
     <url>http://twill.apache.org</url>
diff --git a/twill-api/pom.xml b/twill-api/pom.xml
index 905abee..c59f5dd 100644
--- a/twill-api/pom.xml
+++ b/twill-api/pom.xml
@@ -24,7 +24,7 @@
     <parent>
         <groupId>org.apache.twill</groupId>
         <artifactId>twill-parent</artifactId>
-        <version>0.13.0-SNAPSHOT</version>
+        <version>0.13.0</version>
     </parent>
 
     <artifactId>twill-api</artifactId>
diff --git a/twill-common/pom.xml b/twill-common/pom.xml
index 4bf7c1b..4e9c746 100644
--- a/twill-common/pom.xml
+++ b/twill-common/pom.xml
@@ -22,7 +22,7 @@
     <parent>
         <artifactId>twill-parent</artifactId>
         <groupId>org.apache.twill</groupId>
-        <version>0.13.0-SNAPSHOT</version>
+        <version>0.13.0</version>
     </parent>
     <modelVersion>4.0.0</modelVersion>
 
diff --git a/twill-core/pom.xml b/twill-core/pom.xml
index 4bee172..f295846 100644
--- a/twill-core/pom.xml
+++ b/twill-core/pom.xml
@@ -22,7 +22,7 @@
     <parent>
         <artifactId>twill-parent</artifactId>
         <groupId>org.apache.twill</groupId>
-        <version>0.13.0-SNAPSHOT</version>
+        <version>0.13.0</version>
     </parent>
     <modelVersion>4.0.0</modelVersion>
 
diff --git a/twill-discovery-api/pom.xml b/twill-discovery-api/pom.xml
index 8a2587c..4eab9ce 100644
--- a/twill-discovery-api/pom.xml
+++ b/twill-discovery-api/pom.xml
@@ -22,7 +22,7 @@
     <parent>
         <artifactId>twill-parent</artifactId>
         <groupId>org.apache.twill</groupId>
-        <version>0.13.0-SNAPSHOT</version>
+        <version>0.13.0</version>
     </parent>
     <modelVersion>4.0.0</modelVersion>
 
diff --git a/twill-discovery-core/pom.xml b/twill-discovery-core/pom.xml
index ac9b73d..1b76d17 100644
--- a/twill-discovery-core/pom.xml
+++ b/twill-discovery-core/pom.xml
@@ -22,7 +22,7 @@
     <parent>
         <artifactId>twill-parent</artifactId>
         <groupId>org.apache.twill</groupId>
-        <version>0.13.0-SNAPSHOT</version>
+        <version>0.13.0</version>
     </parent>
     <modelVersion>4.0.0</modelVersion>
 
diff --git a/twill-examples/echo/pom.xml b/twill-examples/echo/pom.xml
index 444b97a..464bf61 100644
--- a/twill-examples/echo/pom.xml
+++ b/twill-examples/echo/pom.xml
@@ -25,7 +25,7 @@
     <parent>
         <artifactId>twill-examples</artifactId>
         <groupId>org.apache.twill</groupId>
-        <version>0.13.0-SNAPSHOT</version>
+        <version>0.13.0</version>
     </parent>
 
     <name>Apache Twill examples: Echo</name>
diff --git a/twill-examples/pom.xml b/twill-examples/pom.xml
index 9a1343f..0601122 100644
--- a/twill-examples/pom.xml
+++ b/twill-examples/pom.xml
@@ -25,7 +25,7 @@
     <parent>
         <groupId>org.apache.twill</groupId>
         <artifactId>twill-parent</artifactId>
-        <version>0.13.0-SNAPSHOT</version>
+        <version>0.13.0</version>
     </parent>
 
     <artifactId>twill-examples</artifactId>
diff --git a/twill-examples/yarn/pom.xml b/twill-examples/yarn/pom.xml
index efe4dea..e7f66af 100644
--- a/twill-examples/yarn/pom.xml
+++ b/twill-examples/yarn/pom.xml
@@ -24,7 +24,7 @@
     <parent>
         <artifactId>twill-examples</artifactId>
         <groupId>org.apache.twill</groupId>
-        <version>0.13.0-SNAPSHOT</version>
+        <version>0.13.0</version>
     </parent>
 
     <name>Apache Twill examples: YARN</name>
diff --git a/twill-ext/pom.xml b/twill-ext/pom.xml
index 819aee2..8f13f04 100644
--- a/twill-ext/pom.xml
+++ b/twill-ext/pom.xml
@@ -22,7 +22,7 @@
     <parent>
         <artifactId>twill-parent</artifactId>
         <groupId>org.apache.twill</groupId>
-        <version>0.13.0-SNAPSHOT</version>
+        <version>0.13.0</version>
     </parent>
 
     <modelVersion>4.0.0</modelVersion>
diff --git a/twill-java8-test/pom.xml b/twill-java8-test/pom.xml
index 87d2188..704e34c 100644
--- a/twill-java8-test/pom.xml
+++ b/twill-java8-test/pom.xml
@@ -24,7 +24,7 @@
     <parent>
         <groupId>org.apache.twill</groupId>
         <artifactId>twill-parent</artifactId>
-        <version>0.13.0-SNAPSHOT</version>
+        <version>0.13.0</version>
     </parent>
 
     <artifactId>twill-java8-test</artifactId>
diff --git a/twill-yarn/pom.xml b/twill-yarn/pom.xml
index ae68a2e..3b96be3 100644
--- a/twill-yarn/pom.xml
+++ b/twill-yarn/pom.xml
@@ -22,7 +22,7 @@
     <parent>
         <artifactId>twill-parent</artifactId>
         <groupId>org.apache.twill</groupId>
-        <version>0.13.0-SNAPSHOT</version>
+        <version>0.13.0</version>
     </parent>
     <modelVersion>4.0.0</modelVersion>
 
diff --git a/twill-zookeeper/pom.xml b/twill-zookeeper/pom.xml
index 6499367..9dafcb3 100644
--- a/twill-zookeeper/pom.xml
+++ b/twill-zookeeper/pom.xml
@@ -22,7 +22,7 @@
     <parent>
         <artifactId>twill-parent</artifactId>
         <groupId>org.apache.twill</groupId>
-        <version>0.13.0-SNAPSHOT</version>
+        <version>0.13.0</version>
     </parent>
     <modelVersion>4.0.0</modelVersion>