add API for listening onActivityResult and onNewIntent event in Activity
big refactor of the android module, as well as a better documentation
Merge branch 'master' of github.com:kivy/python-for-android
new android.activity module, that provide bind/unbind() method for on_new_intent / on_activity_result events.
android.activity: fix unbind and activity result bind()
remove invalid kivy_stable recipe