alarms

[forrestguice]

• adds NaturalHourSelectFragment, NaturalHourAlarmFragment, and AlarmActivity; responds to suntimes.action.PICK_EVENT.
• extends NaturalHourProvider to implement suntimes.action.ADDON_EVENT; now possible to schedule repeating alarms (requires Suntimes v0.14.0) (#7).
• adds EXTRA_SHOW_DATE; main activity now responds to suntimes.action.SHOW_DATE.
• increments SuntimesAddon dependency (v0.2.0 -> v0.3.0).