update Blur
update blur animation, fix statusBar flash issue
Merge branch 'master' of https://github.com/ChrisXu1221/CXAlertView

Conflicts:
	CXAlertView/CXAlertView.m
Merge branch 'master' of https://github.com/ChrisXu1221/CXAlertView

Conflicts:
	CXAlertView/CXAlertBackgroundWindow.m
	CXAlertView/CXAlertView.m