Base url without trailing '/'

This will allow cleaner url in templates and javascripts.

lib/gollum/frontend/app.rb

@@ -82,7 +82,7 @@ module Precious
     end
 
     before do
-      @base_url = url('/', false)
+      @base_url = url('/', false).chomp('/')
       settings.wiki_options.merge!({ :base_path => @base_url }) unless settings.wiki_options.has_key? :base_path
     end