Improve #6 by not detaching rootViewController on '-show' automatically & add '-detachRootViewController' method to call manually.
Update README.md
Don't crop statusBarFrame for iOS7's flat-design.
[Migration] Fix duplicated confirmAlertView by replacing NSRunloop-run to dispatch_after.
Merge branch 'iOS7' into develop

Conflicts:
	Classes/YISplashScreen.m