Resolved an issue where the app would not produce sound while the silent switch was on.  Tones will now play even when the silent switch is on!

Target updated Android APIs

New version!  Completely rebuilt from the ground up to include highly requested features such as volume control, chords, and pitch adjustment.

This follow on release improves the metronome animation, prevents phone from going to sleep while the app is open, and increases the touch area for some UI elements.