Append aliased actions (don't overwrite them) - closes #20

lib/cancan/ability.rb

@@ -156,7 +156,8 @@ module CanCan
     # This way one can use params[:action] in the controller to determine the permission.
     def alias_action(*args)
       target = args.pop[:to]
-      aliased_actions[target] = args
+      aliased_actions[target] ||= []
+      aliased_actions[target] += args
     end
     
     private