Add vibrate function.
	modified:   AndroidManifest.xml
	modified:   res/layout/activity_main.xml
	new file:   res/raw/fallbackring.ogg
	new file:   res/raw/in_call_alarm.ogg
	modified:   src/com/xy/oalarm/Constant.java
	modified:   src/com/xy/oalarm/MainActivity.java
	modified:   src/com/xy/oalarm/OAlarmDbManager.java
	new file:   src/com/xy/oalarm/OAlarmProvider.java
	new file:   src/com/xy/oalarm/OAlarmRingService.java
	modified:   src/com/xy/oalarm/OAlarmService.java
	modified:   src/com/xy/oalarm/TimeDBHelper.java