Restore base_url for baseUrl in JavaScript

lib/gollum/templates/layout.mustache

@@ -14,7 +14,7 @@
 
   <script>
   var criticMarkup = '{{critic_markup}}';
-	var baseUrl = '{{page_route}}';
+	var baseUrl = '{{base_url}}';
 	var uploadDest = 'uploads';
 	var perPageUploads = '{{per_page_uploads}}';
 	if (perPageUploads == 'true') {

lib/gollum/views/layout.rb

@@ -26,6 +26,10 @@ module Precious
         !@path.nil?
       end
 
+      def base_url
+        @base_url
+      end
+
       def custom_path
         @base_url
       end