Updated to most recent API version
Merge pull request #1 from zumbrunnen/master

Updated to most recent API version
Project related files added (Android Studio)
Merge pull request #1 from zumbrunnen/DroidPlanner

Updated to most recent API version, Android Studio compat
Removing *.iml from version control

They contain too much local info and change arbitrarily
Merge pull request #2 from zumbrunnen/gradle_cleanup

Gradle Cleanup