add octocat icon link to repository

css/style.css

@@ -181,4 +181,16 @@ body.fixed-header-on {
 .language-change {
     max-height: 500px;
     overflow-y: auto;
+}
+
+.octocat:hover .octocat-arm {
+    animation: wave-arm .56s infinite;
+    transform-origin: 13rem 10.6rem
+}
+.octocat .octocat-arm, .octocat .octocat-body {
+    fill: #f4f5f6
+}
+@keyframes wave-arm {
+    0%, 50% {transform: rotate(0)}
+    25%, 75% {transform: rotate(-25deg)}
 }

nav.php

@@ -44,5 +44,6 @@
                     </ul>
                 </div>
             </div>
+            <a class="hidden-xs" href="https://github.com/uiisc/uiisc.com" title="Source on Github" target="_blank"><svg class="octocat" viewBox="0 0 250 250" style="border: 0;color: #f4f5f6;fill: #5e6772;height: 5.2rem;width: 5.2rem;position: fixed;right: 0;top: 0;z-index: 1"><path d="M0,0 L115,115 L130,115 L142,142 L250,250 L250,0 Z"></path><path class="octocat-arm" d="M128.3,109.0 C113.8,99.7 119.0,89.6 119.0,89.6 C122.0,82.7 120.5,78.6 120.5,78.6 C119.2,72.0 123.4,76.3 123.4,76.3 C127.3,80.9 125.5,87.3 125.5,87.3 C122.9,97.6 130.6,101.9 134.4,103.2"></path><path class="octocat-body" d="M115.0,115.0 C114.9,115.1 118.7,116.5 119.8,115.4 L133.7,101.6 C136.9,99.2 139.9,98.4 142.2,98.6 C133.8,88.0 127.5,74.4 143.8,58.0 C148.5,53.4 154.0,51.2 159.7,51.0 C160.3,49.4 163.2,43.6 171.4,40.1 C171.4,40.1 176.1,42.5 178.8,56.2 C183.1,58.6 187.2,61.8 190.9,65.4 C194.5,69.0 197.7,73.2 200.1,77.6 C213.8,80.2 216.3,84.9 216.3,84.9 C212.7,93.1 206.9,96.0 205.4,96.6 C205.1,102.4 203.0,107.8 198.3,112.5 C181.9,128.9 168.3,122.5 157.7,114.1 C157.9,116.9 156.7,120.9 152.7,124.9 L141.0,136.5 C139.8,137.7 141.6,141.9 141.8,141.8 Z"></path></svg></a>
         </nav>
     </div>