Update docs header to have stable and unstable docs, fix download URL
diff --git a/about.html b/about.html
index 2a29662..792b2b0 100644
--- a/about.html
+++ b/about.html
@@ -47,7 +47,16 @@
           <div class="navbar-collapse collapse">
             <ul class="nav navbar-nav">
               <li><a href="https://asterixdb.incubator.apache.org/download.html">Download</a></li>
-              <li><a href="http://asterixdb.ics.uci.edu/documentation/index.html">Documentation  <i class="fa fa-external-link fa-sm"></i></a></li>
+              <li class="dropdown">
+                <a href="#" class="dropdown-toggle" data-toggle="dropdown" role="button" aria-expanded="false">Documentation<span class="caret"></span></a>
+                <ul class="dropdown-menu" role="menu">
+                  <li class="dropdown-header">Stable release</li>
+                  <li><a href="http://asterixdb.ics.uci.edu/documentation/index.html">Documentation for 0.8.6<i class="fa fa-external-link fa-sm"></i></a></li>
+                  <li class="divider"></li>
+                  <li class="dropdown-header">Snapshot release</li>
+                  <li><a href="https://asterix-jenkins.ics.uci.edu/job/asterix-test-full/site/asterix-doc/index.html">Documentation for 0.8.7-SNAPSHOT  <i class="fa fa-external-link fa-sm"></i></a></li>
+                </ul>
+              </li>
               <li><a href="https://asterixdb.incubator.apache.org/about.html">About</a></li>
               <li><a href="https://asterixdb.incubator.apache.org/community.html">Community</a></li>
               <li class="dropdown">
diff --git a/community.html b/community.html
index 02695e5..2d313c0 100644
--- a/community.html
+++ b/community.html
@@ -47,7 +47,16 @@
           <div class="navbar-collapse collapse">
             <ul class="nav navbar-nav">
               <li><a href="https://asterixdb.incubator.apache.org/download.html">Download</a></li>
-              <li><a href="http://asterixdb.ics.uci.edu/documentation/index.html">Documentation  <i class="fa fa-external-link fa-sm"></i></a></li>
+              <li class="dropdown">
+                <a href="#" class="dropdown-toggle" data-toggle="dropdown" role="button" aria-expanded="false">Documentation<span class="caret"></span></a>
+                <ul class="dropdown-menu" role="menu">
+                  <li class="dropdown-header">Stable release</li>
+                  <li><a href="http://asterixdb.ics.uci.edu/documentation/index.html">Documentation for 0.8.6<i class="fa fa-external-link fa-sm"></i></a></li>
+                  <li class="divider"></li>
+                  <li class="dropdown-header">Snapshot release</li>
+                  <li><a href="https://asterix-jenkins.ics.uci.edu/job/asterix-test-full/site/asterix-doc/index.html">Documentation for 0.8.7-SNAPSHOT  <i class="fa fa-external-link fa-sm"></i></a></li>
+                </ul>
+              </li>
               <li><a href="https://asterixdb.incubator.apache.org/about.html">About</a></li>
               <li><a href="https://asterixdb.incubator.apache.org/community.html">Community</a></li>
               <li class="dropdown">
diff --git a/dev-setup.html b/dev-setup.html
index ab9aa27..b623ae7 100644
--- a/dev-setup.html
+++ b/dev-setup.html
@@ -47,7 +47,16 @@
           <div class="navbar-collapse collapse">
             <ul class="nav navbar-nav">
               <li><a href="https://asterixdb.incubator.apache.org/download.html">Download</a></li>
-              <li><a href="http://asterixdb.ics.uci.edu/documentation/index.html">Documentation  <i class="fa fa-external-link fa-sm"></i></a></li>
+              <li class="dropdown">
+                <a href="#" class="dropdown-toggle" data-toggle="dropdown" role="button" aria-expanded="false">Documentation<span class="caret"></span></a>
+                <ul class="dropdown-menu" role="menu">
+                  <li class="dropdown-header">Stable release</li>
+                  <li><a href="http://asterixdb.ics.uci.edu/documentation/index.html">Documentation for 0.8.6<i class="fa fa-external-link fa-sm"></i></a></li>
+                  <li class="divider"></li>
+                  <li class="dropdown-header">Snapshot release</li>
+                  <li><a href="https://asterix-jenkins.ics.uci.edu/job/asterix-test-full/site/asterix-doc/index.html">Documentation for 0.8.7-SNAPSHOT  <i class="fa fa-external-link fa-sm"></i></a></li>
+                </ul>
+              </li>
               <li><a href="https://asterixdb.incubator.apache.org/about.html">About</a></li>
               <li><a href="https://asterixdb.incubator.apache.org/community.html">Community</a></li>
               <li class="dropdown">
diff --git a/download.html b/download.html
index 8b44c42..ec40ff1 100644
--- a/download.html
+++ b/download.html
@@ -47,7 +47,16 @@
           <div class="navbar-collapse collapse">
             <ul class="nav navbar-nav">
               <li><a href="https://asterixdb.incubator.apache.org/download.html">Download</a></li>
-              <li><a href="http://asterixdb.ics.uci.edu/documentation/index.html">Documentation  <i class="fa fa-external-link fa-sm"></i></a></li>
+              <li class="dropdown">
+                <a href="#" class="dropdown-toggle" data-toggle="dropdown" role="button" aria-expanded="false">Documentation<span class="caret"></span></a>
+                <ul class="dropdown-menu" role="menu">
+                  <li class="dropdown-header">Stable release</li>
+                  <li><a href="http://asterixdb.ics.uci.edu/documentation/index.html">Documentation for 0.8.6<i class="fa fa-external-link fa-sm"></i></a></li>
+                  <li class="divider"></li>
+                  <li class="dropdown-header">Snapshot release</li>
+                  <li><a href="https://asterix-jenkins.ics.uci.edu/job/asterix-test-full/site/asterix-doc/index.html">Documentation for 0.8.7-SNAPSHOT  <i class="fa fa-external-link fa-sm"></i></a></li>
+                </ul>
+              </li>
               <li><a href="https://asterixdb.incubator.apache.org/about.html">About</a></li>
               <li><a href="https://asterixdb.incubator.apache.org/community.html">Community</a></li>
               <li class="dropdown">
@@ -106,7 +115,7 @@
 <div class="col-md-6">
 
     <p><a class="btn btn-md btn-success" href="http://asterixdb.ics.uci.edu/download/0.8.6/asterix-installer-0.8.6-binary-assembly.zip" role="button">Download AsterixDB 0.8.6 <i class="fa fa-download fa-lg"></i> </a></p>
-    <p><a class="btn btn-md btn-warning" href="https://asterix-jenkins.ics.uci.edu/job/asterix-test-full/lastStableBuild/edu.uci.ics.asterix$asterix-installer/artifact/edu.uci.ics.asterix/asterix-installer/0.8.7-SNAPSHOT/asterix-installer-0.8.7-SNAPSHOT-binary-assembly.zip" role="button">Download AsterixDB 0.8.7-SNAPSHOT <i class="fa fa-download fa-lg"></i> </a></p>
+    <p><a class="btn btn-md btn-warning" href="https://asterix-jenkins.ics.uci.edu/job/asterix-test-full/lastStableBuild/org.apache.asterix$asterix-installer/artifact/org.apache.asterix/asterix-installer/0.8.7-SNAPSHOT/asterix-installer-0.8.7-SNAPSHOT-binary-assembly.zip" role="button">Download AsterixDB 0.8.7-SNAPSHOT <i class="fa fa-download fa-lg"></i> </a></p>
 
   </div>
 
diff --git a/index.html b/index.html
index c7a9858..d5e06fe 100644
--- a/index.html
+++ b/index.html
@@ -47,7 +47,16 @@
           <div class="navbar-collapse collapse">
             <ul class="nav navbar-nav">
               <li><a href="https://asterixdb.incubator.apache.org/download.html">Download</a></li>
-              <li><a href="http://asterixdb.ics.uci.edu/documentation/index.html">Documentation  <i class="fa fa-external-link fa-sm"></i></a></li>
+              <li class="dropdown">
+                <a href="#" class="dropdown-toggle" data-toggle="dropdown" role="button" aria-expanded="false">Documentation<span class="caret"></span></a>
+                <ul class="dropdown-menu" role="menu">
+                  <li class="dropdown-header">Stable release</li>
+                  <li><a href="http://asterixdb.ics.uci.edu/documentation/index.html">Documentation for 0.8.6<i class="fa fa-external-link fa-sm"></i></a></li>
+                  <li class="divider"></li>
+                  <li class="dropdown-header">Snapshot release</li>
+                  <li><a href="https://asterix-jenkins.ics.uci.edu/job/asterix-test-full/site/asterix-doc/index.html">Documentation for 0.8.7-SNAPSHOT  <i class="fa fa-external-link fa-sm"></i></a></li>
+                </ul>
+              </li>
               <li><a href="https://asterixdb.incubator.apache.org/about.html">About</a></li>
               <li><a href="https://asterixdb.incubator.apache.org/community.html">Community</a></li>
               <li class="dropdown">
diff --git a/pushing.html b/pushing.html
index fc1f36c..f9a5d05 100644
--- a/pushing.html
+++ b/pushing.html
@@ -47,7 +47,16 @@
           <div class="navbar-collapse collapse">
             <ul class="nav navbar-nav">
               <li><a href="https://asterixdb.incubator.apache.org/download.html">Download</a></li>
-              <li><a href="http://asterixdb.ics.uci.edu/documentation/index.html">Documentation  <i class="fa fa-external-link fa-sm"></i></a></li>
+              <li class="dropdown">
+                <a href="#" class="dropdown-toggle" data-toggle="dropdown" role="button" aria-expanded="false">Documentation<span class="caret"></span></a>
+                <ul class="dropdown-menu" role="menu">
+                  <li class="dropdown-header">Stable release</li>
+                  <li><a href="http://asterixdb.ics.uci.edu/documentation/index.html">Documentation for 0.8.6<i class="fa fa-external-link fa-sm"></i></a></li>
+                  <li class="divider"></li>
+                  <li class="dropdown-header">Snapshot release</li>
+                  <li><a href="https://asterix-jenkins.ics.uci.edu/job/asterix-test-full/site/asterix-doc/index.html">Documentation for 0.8.7-SNAPSHOT  <i class="fa fa-external-link fa-sm"></i></a></li>
+                </ul>
+              </li>
               <li><a href="https://asterixdb.incubator.apache.org/about.html">About</a></li>
               <li><a href="https://asterixdb.incubator.apache.org/community.html">Community</a></li>
               <li class="dropdown">