iOS 7 Style

Made it only blur under the notification center itself, rather than the
entire screen.
Helps create the effect of pulling down frosted glass over the screen.

Also made it compile with my default installation of Theos.
As this has deleted the Tweak.x file and I don't how to tell Git I
renamed, not deleted, it all you need to know is.

Added a load of headers inside the file at the top so it compiles on
it's own with no other headers setup.

Messed around in
-(void)positionSlidingViewAtY:(CGFloat)y;

Also added a .deb for people that don't what to compile it themselves.