To Do List
- store preferences to sqlite3 database
- minutes for each button
- beep, vibrate, blink toggle fields
- see debugger/notes section
- reset to sytem defaults (drop table)
- display meta info about past pomodoros and breaks
- do something when the timer hits 0
- beep, vibrate, blink, ...
- on stop, call pe.stop()
- stop button?
- mark interruptions?