Updated the compiler target api to android-7 for IOIOLib, and fixed all lint/deprecation related wranings. (left minimum SDK for compilation at 3).
Merge pull request #72 from mishas/update-version

Cleanup (linter, dead code, deprecated API)

Updated the compiler target api to android-7 for IOIOLib, and fixed all lint/deprecation related wranings. (left minimum SDK for compilation at 3).