add subreddit URL

Author: jube

index.html

@@ -14,6 +14,7 @@
         <h1>Gamedev Framework</h1>
         <p>A framework to build 2D games in C++11</p>
         <p class="view"><a href="https://github.com/GamedevFramework/gf">View the Project on GitHub <small>GamedevFramework/gf</small></a></p>
+        <p class="view"><a href="https://www.reddit.com/r/GamedevFramework/">Talk on the Subreddit <small>/r/GamedevFramework</small></a></p>
         <p class="view"><a href="irc://chat.freenode.net/gf-devel">Join the IRC channel on Freenode <small>#gf-devel</small></a></p>
         <ul>
           <li><a href="https://github.com/GamedevFramework/gf/archive/master.zip">Download <strong>ZIP File</strong></a></li>