[GEARPUMP-324] Fix invalid links on gearpump site
diff --git a/_posts/2015-12-29-0.7.1_release.md b/_posts/2015-12-29-0.7.1_release.md
deleted file mode 100644
index c9a6143..0000000
--- a/_posts/2015-12-29-0.7.1_release.md
+++ /dev/null
@@ -1,16 +0,0 @@
----
-layout: global
-tile: Gearpump 0.7.1 Release
-rootDir: ../../..
----
-
-## Gearpump 0.7.1 highlights
-
-### new UI experience
-Now the frontend UI can safely support applications with tens of thousands to tasks.
-
-### Akka-stream 1.0 experimental module
-We added a experiment module, which use Akka-stream 1.0 DSL to express big data streaming problems.
-
-### new YARN module
-With new YARN module, user are allowed to add new machines into Gearpump cluster.
\ No newline at end of file
diff --git a/content/2015/12/29/0.7.1_release.html b/content/2015/12/29/0.7.1_release.html
deleted file mode 100644
index 45d115a..0000000
--- a/content/2015/12/29/0.7.1_release.html
+++ /dev/null
@@ -1,156 +0,0 @@
-<!DOCTYPE html>
-<!--[if lt IE 7]>      <html class="no-js lt-ie9 lt-ie8 lt-ie7"> <![endif]-->
-<!--[if IE 7]>         <html class="no-js lt-ie9 lt-ie8"> <![endif]-->
-<!--[if IE 8]>         <html class="no-js lt-ie9"> <![endif]-->
-<!--[if gt IE 8]><!--> <html class="no-js"> <!--<![endif]-->
-<head>
-  <meta charset="utf-8">
-  <meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1">
-  <meta name="viewport" content="width=device-width,initial-scale=1,maximum-scale=1"/>
-  <title>Apache Gearpump (Incubating): 0.7.1_release</title>
-  
-
-  
-
-  
-
-  <link rel="stylesheet" href="../../../css/bootstrap-3.3.5.min.css">
-  <style>
-    body {
-      padding-top: 60px;
-      padding-bottom: 40px;
-    }
-  </style>
-  <link rel="stylesheet" href="../../../css/main.css">
-  <link rel="stylesheet" href="css/pygments-default.css">
-  <script src="../../../js/vendor/modernizr-2.6.1-respond-1.1.0.min.js"></script>
-</head>
-<body>
-  <!--[if lt IE 7]>
-    <p class="chromeframe">You are using an outdated browser. <a href="http://browsehappy.com/">Upgrade your browser today</a> or <a href="http://www.google.com/chromeframe/?redirect=true">install Google Chrome Frame</a> to better experience this site.</p>l
-  <![endif]-->
-
-  <div class="navbar navbar-inverse navbar-fixed-top" id="topbar">
-    <div class="container">
-      <div class="navbar-header">
-        <button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#navbar" aria-expanded="false" aria-controls="navbar">
-          <span class="sr-only">Toggle navigation</span>
-          <span class="icon-bar"></span>
-          <span class="icon-bar"></span>
-          <span class="icon-bar"></span>
-        </button>
-        <a class="navbar-brand" href="/">Apache Gearpump (incubating)</a>
-      </div>
-      <div id="navbar" class="collapse navbar-collapse">
-        <ul class="nav navbar-nav">
-          <li><a href="overview.html">Overview</a></li>
-          <li class="dropdown">
-            <a href="#" class="dropdown-toggle" data-toggle="dropdown">Docs<b class="caret"></b></a>
-            <ul class="dropdown-menu">
-              <li><a href="releases/latest/index.html">Latest Release (0.8.4)</a></li>
-              <li><a href="usecases.html">Use Cases</a></li>
-              <li class="divider"></li>
-              <li><a href="publications.html">Publications</a></li>
-            </ul>
-          </li>
-          <li><a href="downloads.html">Downloads</a></li>
-          <li><a href="faq.html">FAQ</a></li>
-          <li class="dropdown">
-            <a href="#" class="dropdown-toggle" data-toggle="dropdown">Community<b class="caret"></b></a>
-            <ul class="dropdown-menu">
-              <li class="dropdown-header">Community</li>
-              <li><a href="community.html#mailing-lists">Mailing Lists</a></li>
-              <li><a href="community.html#issue-tracker">Issue Tracker</a></li>
-              <li><a href="community.html#source-code-repositories">Source Code Repositories</a></li>
-              <li><a href="community.html#who-we-are">Who We Are</a></li>
-              <li><a href="https://twitter.com/ApacheGearpump" target="_blank">Follow us on Twitter</a></li>
-              <li class="divider"></li>
-              <li class="dropdown-header">Contribute</li>
-              <li><a href="how-to-contribute.html">How to Contribute</a></li>
-              <li><a href="coding-style.html">Coding Style</a></li>
-            </ul>
-          </li>
-        </ul>
-
-        <ul class="nav navbar-nav">
-          <li class="dropdown">
-            <a href="#" class="dropdown-toggle" data-toggle="dropdown">ASF<b class="caret"></b></a>
-            <ul class="dropdown-menu">
-              <li><a href="license.html">License</a></li>
-              <li><a href="//apache.org/foundation/how-it-works.html" target="_blank">How Apache Works</a></li>
-              <li><a href="//apache.org/foundation" target="_blank">Foundation</a></li>
-              <li><a href="//www.apache.org/foundation/sponsorship.html" target="_blank">Sponsoring Apache</a></li>
-            </ul>
-          </li>
-        </ul>
-
-<a class="ribbon hidden-xs" href="//github.com/apache/incubator-gearpump"><img src="img/forkme_right_red_aa0000.png" alt="Fork me on GitHub"/></a>
-
-      </div>
-    </div>
-  </div>
-
-  <div class="container" id="content" style="margin-bottom: 50px">
-   
-    <h1 class="title">0.7.1_release</h1>
-   
-
-   <h2 id="gearpump-071-highlights">Gearpump 0.7.1 highlights</h2>
-
-<h3 id="new-ui-experience">new UI experience</h3>
-<p>Now the frontend UI can safely support applications with tens of thousands to tasks.</p>
-
-<h3 id="akka-stream-10-experimental-module">Akka-stream 1.0 experimental module</h3>
-<p>We added a experiment module, which use Akka-stream 1.0 DSL to express big data streaming problems.</p>
-
-<h3 id="new-yarn-module">new YARN module</h3>
-<p>With new YARN module, user are allowed to add new machines into Gearpump cluster.</p>
-
-  </div> <!-- /container -->
-
-  <footer class="navbar navbar-default navbar-fixed-bottom">
-    <div class="container text-center" style="padding: 14px 0 10px 0; line-height: 150%">
-      <p class="text-muted">
-        Copyright © 2017 <a href="//apache.org" target="_blank">The Apache Software Foundation</a>.
-        All Rights Reserved.<br/>
-        Apache and the Apache feather logo are trademarks of The Apache Software Foundation.
-      </p>
-    </div>
-  </footer>
-
-  <script src="js/vendor/jquery-2.1.4.min.js"></script>
-  <script src="js/vendor/bootstrap-3.3.5.min.js"></script>
-  <script src="js/vendor/anchor-1.1.1.min.js"></script>
-  <script src="js/main.js"></script>
-
-  <!-- MathJax Section -->
-  <script type="text/x-mathjax-config">
-    MathJax.Hub.Config({
-      TeX: { equationNumbers: { autoNumber: "AMS" } }
-    });
-  </script>
-  <script>
-    // Note that we load MathJax this way to work with local file (file://), HTTP and HTTPS.
-    // We could use "//cdn.mathjax...", but that won't support "file://".
-    (function(d, script) {
-      script = d.createElement('script');
-      script.type = 'text/javascript';
-      script.async = true;
-      script.onload = function(){
-        MathJax.Hub.Config({
-          tex2jax: {
-            inlineMath: [ ["$", "$"], ["\\\\(","\\\\)"] ],
-            displayMath: [ ["$$","$$"], ["\\[", "\\]"] ],
-            processEscapes: true,
-            skipTags: ['script', 'noscript', 'style', 'textarea', 'pre']
-          }
-        });
-      };
-      script.src = ('https:' == document.location.protocol ? 'https://' : 'http://') +
-        'cdn.mathjax.org/mathjax/latest/MathJax.js?config=TeX-AMS-MML_HTMLorMML';
-      d.getElementsByTagName('head')[0].appendChild(script);
-    }(document));
-  </script>
-</body>
-</html>
-
diff --git a/content/blogs.html b/content/blogs.html
index 1a97bdc..c99b939 100644
--- a/content/blogs.html
+++ b/content/blogs.html
@@ -97,10 +97,6 @@
 
    <ul>
   
-    <li>
-      <a href="/2015/12/29/0.7.1_release.html">0.7.1_release</a>      
-    </li>
-  
 </ul>
 
   </div> <!-- /container -->
diff --git a/content/faq.html b/content/faq.html
index 162f1d5..b6eb52f 100644
--- a/content/faq.html
+++ b/content/faq.html
@@ -147,6 +147,8 @@
 <h3 id="relation-with-storm-and-spark-streaming">Relation with Storm and Spark Streaming</h3>
 <p>Storm and Spark Streaming are proven platforms. There are many production deployments. Compared with them, Gearpump is not than proven and there is no production deployment yet. However, there is no single platform that can cover every use case. Gearpump has its own +1 points in some unique use cases. For instance, for the IOT use cases, Gearpump may be considered convenient because the topology can be deployed to edge device with feature of location transparency. For another example, when users want to upgrade the application online without service interruption, Gearpump may be suitable as it can dynamically modify the computation DAG on the fly. To explore more good use cases that are suitable for Gearpump, please check the section <a href="usecases.html">What is a good use case for Gearpump</a>.</p>
 
+<h2 id="technical-internals">Technical Internals</h2>
+
 <h3 id="why-not-using-akka-persistence-to-store-the-checkpoint-file">Why not using Akka persistence to store the checkpoint file?</h3>
 
 <ol>
diff --git a/faq.md b/faq.md
index e9e4d9d..2a94470 100644
--- a/faq.md
+++ b/faq.md
@@ -31,6 +31,8 @@
 ### Relation with Storm and Spark Streaming
 Storm and Spark Streaming are proven platforms. There are many production deployments. Compared with them, Gearpump is not than proven and there is no production deployment yet. However, there is no single platform that can cover every use case. Gearpump has its own +1 points in some unique use cases. For instance, for the IOT use cases, Gearpump may be considered convenient because the topology can be deployed to edge device with feature of location transparency. For another example, when users want to upgrade the application online without service interruption, Gearpump may be suitable as it can dynamically modify the computation DAG on the fly. To explore more good use cases that are suitable for Gearpump, please check the section [What is a good use case for Gearpump](usecases.html).
 
+## Technical Internals
+
 ### Why not using Akka persistence to store the checkpoint file?
 
 1. We only checkpoint file to disk when necessary, not at record level.