Remove native app

This removes the nativeAppBuilding Project until it will be re-added once fixed in a different branch.

- [x] Remove NativeAppActivity
- [x] Remove Tests
- [x] Remove project directory
- [x] Refactor FullParser

[Successful testrun.](http://catrobatgw.ist.tugraz.at:8080/job/Catroid-custom-branch-test/173/)