new file:   res/layout/activity_setting_app.xml
	new file:   src/cn/jlu/ge/dreamclock/activity/AppSettingActivity.java
	modified:   src/cn/jlu/ge/dreamclock/activity/MainActivity.java
	modified:   src/cn/jlu/ge/dreamclock/activity/SignInActivity.java
	modified:   src/cn/jlu/ge/dreamclock/tools/FriendsDBAdapter.java
	modified:   src/cn/jlu/ge/dreamclock/tools/MenuFragment.java