Added favicon

Author: samuelmaddock

app/favicon.png

@@ -6,6 +6,7 @@
 	<meta name="keywords" content="glua, lua, docs, documentation, gmod, garrys, garry, mod, wiki">
 	<meta name="description" content="Quick documentation lookup for Garry's Mod Lua.">
 	<meta name="author" content="Samuel Maddock">
+	<link rel="shortcut icon" href="favicon.png">
 	<link rel="stylesheet" href="css/style.css">
 	<link rel="stylesheet" href="css/lua-obsidian.css">
 	<script src="js/lib/angular.min.js" type="text/javascript"></script>