Add Red Hat/CentOS packages section.

Addresses:
* openrazer/openrazer#587
* openrazer/openrazer#399

index.html

@@ -634,10 +634,34 @@ <h4><span class="fa fa-cube"></span> Void Linux</h4>
                   </div>
                 </div>
               </div>
+              <div class="panel panel-default">
+                <div class="panel-heading">
+                  <h4 class="panel-title">
+                    <a data-toggle="collapse" data-parent="#distros" href="#redhat">
+                      <img src="img/distros/redhat.png" alt="Red Hat Logo" style="width:24px; height:24px"/>&nbsp; Red Hat / CentOS
+                    </a>
+                  </h4>
+                </div>
+                <div id="redhat" class="panel-collapse collapse">
+                  <div class="panel-body">
+                    <h4><span class="fa fa-cube"></span> Repository provided by <a href="https://github.com/moozhub">moozhub</a></h4>
+                    <p>
+                        Please follow the instructions from this repository:
+                        <ul>
+                            <li><a href="https://github.com/moozhub/yum-repo-mooz">https://github.com/moozhub/yum-repo-mooz</a></li>
+                        </ul>
+                    </p>
+                    <div class="danger">
+                        <h5><span class="fa fa-warning"></span> OpenRazer <strong>does not officially support</strong> this distribution.
+                        If you need assistance, please raise an issue on the <a href="https://github.com/moozhub/yum-repo-mooz">yum-repo-mooz</a> repository.</h5>
+                    </div>
+                  </div>
+                </div>
+              </div>
               <br>
               <p class="gray">
                 <b>Don't see your distro?</b>
-                <a href="https://github.com/openrazer/openrazer/issues">Please raise an issue</a> and we'll consider adding support for your distro.
+                <a href="https://github.com/openrazer/openrazer/issues">Raise an issue</a> and we'll consider adding support for your distro.
               </p>
             </div>
           </div>