Committed gitignores for .pyc files in tests and pomodoro_evolved
directories.
BreakAlreadyTerminated is now thrown when trying to restart a break
that's timeup or stopped.
CAPITALISED class level constants.
Sped up break tests by factoring out default break durations and time to
expire, then reducing them.
Skipped time remaining test which take 1 second.
Documented Break class.