fix ipad, add cancel and destructive
Merge branch 'master' of github.com:mysterioustrousers/MYSGravityActionSheet

Conflicts:
	MYSGravityActionSheet/MYSGravityActionSheet.h
	MYSGravityActionSheet/MYSGravityActionSheet.m
add back in some changes lost from merging
remove tags, no longer needed
fix iPhone rotation
fix crashes, arrow layout, clean up animation, adjust sizes of buttons
Merge pull request #4 from mysterioustrousers/up-and-down

Full support for up and down arrows on iPad