feat(v2): Remove Github icon

Author: Urigo

demo/calendarDemo.css

@@ -5,11 +5,6 @@ body {
 section {
 	padding-top: 40px;
 }
-.icon-github {
-	background: no-repeat url('../lib/bootstrap/docs/assets/img/github-16px.png');
-	width: 16px;
-	height: 16px;
-}
 .hero-unit {
 	position: relative;
 	padding: 40px 0;

demo/index.html

@@ -47,7 +47,7 @@
                 <h1>UI Calendar</h1>
                 <p>A complete AngularJS directive for the <a href="http://arshaw.com/fullcalendar/">Arshaw FullCalendar</a>.</p>
                 <p class="btn-group">
-                    <a href="https://github.com/angular-ui/ui-calendar" class='btn'><i class='icon-github'></i> Code on Github</a>
+                    <a href="https://github.com/angular-ui/ui-calendar" class='btn'>Code on Github</a>
                     <a href="https://github.com/angular-ui/ui-calendar/archive/master.zip" class='btn btn-primary'><i class="icon-download-alt icon-white"></i> Download <small>(0.1.3)</small></a>
                 </p>
             </div>