[Frontend] Significant re-factoring of CSS and markup

open #95
IN-PROGRESS!;
Mostly buttons and menus classes (s-btn and s-menu);
Removed unused templates and .css files;
Normalized some button containers;

platform/search/res/templates/search.html

@@ -105,7 +105,7 @@
 
         <!-- Load more button --> 
         <div ng-if="controller.areMore()">
-            <a class="load-more-button btn very-subtle vsm"
+            <a class="load-more-button s-btn vsm"
                     ng-click="controller.loadMore()"> 
                 More Results
             </a>