Added BT code but not working for reasons unclear.
Bluetooth support done.
Update APK.
Migrating to gradle. Realtrack is now a self-contained github repository
with all dependent library projects in /libs. I will update the README to
explain how to set things up.
Adding a comment.
Cleaning up lint. Formatted XML source.
Format source.
Adding Travis support.
Update README.
Updating README. Adding screenshots.