Added Timer mode. Set Time button pops up a TimePickerDialog. Start
starts the timer, Stop pauses it. When the time is up, a toast appears. Can
be modified to play a sound or vibrate.
Fixed some unwanted behavior when the timer finishes.
Merge remote-tracking branch 'origin/maps'

Conflicts:
	android/app/src/main/AndroidManifest.xml
	android/app/src/main/res/values/strings.xml
Merge branch 'master' of https://github.com/phillipchengh/Coach_K

Conflicts:
	android/app/src/main/AndroidManifest.xml