1.2:
 * Persistent piano configuration.
 * Add option to only label C on piano.
 * Keep screen on while metronome is on.
 * Add option for metronome to continue when app is closed.
 * Minor bugfixes.

1.1:
 * Fix several crashes on older API versions.
 * Minor editing (add links, fix typos).

1.0:
 * Initial release.
