Initial commit

File import/export working but untested.
Can add/remove/move Intervals in the routine, again untested.
Edit controls show value of active interval, but do not allow values to be changed.
Countdown timer/fullscreen display to be implemented.

Signed-off-by: Ephphatha <ephphatha@thelettereph.com>
Merge branch 'master' of github.com:Ephphatha/WorkoutTimer