Last commit before creating "pomodoro-pause-pomodoro" order.
1. Fixed SettingsActivity (wrong pref name).
2. Fixed using prefs - get string and then parse to ling/int.
3. Finished "pomodoro-pause-pomodoro" order.
4. Long break interval and NumInRow finally work.
5. Removed some unuseful comments.
Added debug settings.
1. Added info about state.
2. Converted some const-strings to R.string.
3. Moved reading prefs to onResume() - reason: updating prefs.
4. Added some tasks.