Update column sizes

Author: zyedidia

index.html

@@ -113,7 +113,7 @@ <h3 class="micro-logo">Micro</h3>
                         <h2>Features</h2>
                     </div>
                 </div>
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+                <div class="col-sm-6">
                     <h4>Easy to Use</h4>
                     <p>Micro's number one feature is being easy to install (it's just a static binary with no dependencies) and easy to use.</p>
 
@@ -124,7 +124,7 @@ <h4>Colors and Highlighting</h4>
                     <p>Micro supports over 75 languages and has 7 default colorschemes to choose from. Micro supports 16, 256, and truecolor themes. Syntax files and colorschemes are also very simple to make.</p>
                 </div>
 
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                     <h4>Plugin System</h4>
                     <p>Micro supports a full-blown plugin system. Plugins are written in Lua and there is a plugin manager to automatically download and install your plugins for you.</p>
 
@@ -144,22 +144,22 @@ <h4>Mouse Support</h4>
             <hr>
 
             <div class="row contributing">
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                     <div class="heading">
                         <h2>Contributing</h2>
                     </div>
                     <p>If you find any bugs, please report them! I am also happy to accept pull requests from anyone.</p>
                     <p>You can use the GitHub issue tracker to report bugs, ask questions, or suggest new features.</p>
                     <p>For a more informal setting to discuss the editor, you can join the Gitter chat.</p>
                     <br>
-                    <div class="col-md-6">
-                        <p><a class="btn btn-md btn-success" href="https://github.com/zyedidia/micro" role="button">View the Github project</a></p>
+                    <div class="col-sm-6">
+                        <p style="text-align:center"><a class="btn btn-md btn-success" href="https://github.com/zyedidia/micro" role="button">View the Github project</a></p>
                     </div>
-                    <div class="col-md-6">
-                        <p><a class="btn btn-md btn-success" href="https://gitter.im/zyedidia/micro" role="button">Join the Gitter Chat</a></p>
+                    <div class="col-sm-6">
+                        <p style="text-align:center"><a class="btn btn-md btn-success" href="https://gitter.im/zyedidia/micro" role="button">Join the Gitter Chat</a></p>
                     </div>
                 </div>
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                     <div class="heading">
                         <h2>Testimonials</h2>
                     </div>