Initial checkin. Now have a group timer model (with test code), and a single view. I was originally playing with a table view too so those remnants still exist.
Adding support for altering the timer color when the timer is approaching its expired time.
Updating view to have a black background.
File cleanup. Refactoring GroupTimerModel to supply all timer needs for creating individual timers as well. Improving naming. Updating references to refactors.