convert all icons to font-awesome vector based / retina compatible icons

Conflicts:
	data/interfaces/default/artist.html

data/interfaces/default/managenew.html

@@ -16,7 +16,7 @@
 <%def name="body()">
 	<div class="table_wrapper">
 	<div id="manageheader" class="title">
-		<h1 class="clearfix"><img src="interfaces/default/images/icon_manage.png" alt="manage"/>Manage New Artists</h1>
+		<h1 class="clearfix"><i class="fa fa-music"></i> Manage New Artists</h1>
 	</div>
 	<form action="addArtists" method="get">
 	<div id="markalbum">