Add support to application:openURL:sourceApplication:annotation

Now you can use `on_open_url` instead.

http://developer.apple.com/library/ios/documentation/uikit/reference/UIApplicationDelegate_Protocol/Reference/Reference.html#//apple_ref/occ/intfm/UIApplicationDelegate/application:openURL:sourceApplication:annotation:
Merge pull request #257 from bastos/add-on_open_url

Add support to application:openURL:sourceApplication:annotation