Add apache repo

Author: manuzhang <owenzhang1990@gmail.com>

Closes #8 from manuzhang/add_apache_repo.
diff --git a/content/downloads.html b/content/downloads.html
index c4b9317..52c6367 100644
--- a/content/downloads.html
+++ b/content/downloads.html
@@ -97,7 +97,7 @@
 
    <h2 id="downloads">Downloads</h2>
 
-<h3 id="latest-stable-release-v081">Latest Stable Release (v0.8.1)</h3>
+<h3 id="current-081-release-v081">Current 0.8.1 Release (v0.8.1)</h3>
 
 <p><a href="https://git-wip-us.apache.org/repos/asf?p=incubator-gearpump.git;a=blob;f=CHANGELOG.md;h=564899ef23176c304f03c4decb2266c19d88d46f;hb=9063ae8c447b711b4b512e79ce8d7aff66924e79">Release Notes</a></p>
 
@@ -113,12 +113,12 @@
 
 <figure class="highlight"><pre><code class="language-xml" data-lang="xml"><span class="nt">&lt;dependencies&gt;</span>
   <span class="nt">&lt;dependency&gt;</span>
-    <span class="nt">&lt;groupId&gt;</span>com.github.intel-hadoop<span class="nt">&lt;/groupId&gt;</span>
+    <span class="nt">&lt;groupId&gt;</span>org.apache.gearpump<span class="nt">&lt;/groupId&gt;</span>
     <span class="nt">&lt;artifactId&gt;</span>gearpump-core_2.11<span class="nt">&lt;/artifactId&gt;</span>
     <span class="nt">&lt;version&gt;</span>0.8.1<span class="nt">&lt;/version&gt;</span>
   <span class="nt">&lt;/dependency&gt;</span>
   <span class="nt">&lt;dependency&gt;</span>
-    <span class="nt">&lt;groupId&gt;</span>com.github.intel-hadoop<span class="nt">&lt;/groupId&gt;</span>
+    <span class="nt">&lt;groupId&gt;</span>org.apache.gearpump<span class="nt">&lt;/groupId&gt;</span>
     <span class="nt">&lt;artifactId&gt;</span>gearpump-streaming_2.11<span class="nt">&lt;/artifactId&gt;</span>
     <span class="nt">&lt;version&gt;</span>0.8.1<span class="nt">&lt;/version&gt;</span>
   <span class="nt">&lt;/dependency&gt;</span>
@@ -138,16 +138,6 @@
     <span class="nt">&lt;url&gt;</span>http://dl.bintray.com/patriknw/maven<span class="nt">&lt;/url&gt;</span>
   <span class="nt">&lt;/repository&gt;</span>
   <span class="nt">&lt;repository&gt;</span>
-    <span class="nt">&lt;id&gt;</span>cloudera<span class="nt">&lt;/id&gt;</span>
-    <span class="nt">&lt;name&gt;</span>Cloudera repo<span class="nt">&lt;/name&gt;</span>
-    <span class="nt">&lt;url&gt;</span>https://repository.cloudera.com/artifactory/cloudera-repos<span class="nt">&lt;/url&gt;</span>
-  <span class="nt">&lt;/repository&gt;</span>
-  <span class="nt">&lt;repository&gt;</span>
-    <span class="nt">&lt;id&gt;</span>vincent<span class="nt">&lt;/id&gt;</span>
-    <span class="nt">&lt;name&gt;</span>vincent<span class="nt">&lt;/name&gt;</span>
-    <span class="nt">&lt;url&gt;</span>http://dl.bintray.com/fvunicorn/maven<span class="nt">&lt;/url&gt;</span>
-  <span class="nt">&lt;/repository&gt;</span>
-  <span class="nt">&lt;repository&gt;</span>
     <span class="nt">&lt;id&gt;</span>non<span class="nt">&lt;/id&gt;</span>
     <span class="nt">&lt;name&gt;</span>non<span class="nt">&lt;/name&gt;</span>
     <span class="nt">&lt;url&gt;</span>http://dl.bintray.com/non/maven<span class="nt">&lt;/url&gt;</span>
diff --git a/downloads.md b/downloads.md
index bbf6e49..422a2c7 100644
--- a/downloads.md
+++ b/downloads.md
@@ -37,6 +37,11 @@
 {% highlight xml %}
 <repositories>
   <repository>
+    <id>apache-repo</id>
+    <name>Apache Maven Repo</name>
+    <url>https://repository.apache.org/content/repositories/snapshots</url>
+  </repository>
+  <repository>
     <id>sonatype-nexus-releases</id>
     <name>Sonatype Nexus Snapshots</name>
     <url>https://oss.sonatype.org/content/repositories/snapshots</url>