Fix PRTweenCGRectLerp using blocks shorthand and add new shorthand methods using blocks with delay value
Merge pull request #26 from danielebogo/master

Fix PRTweenCGRectLerp shorthand
Merge branch 'master' of github.com:dominikhofmann/PRTween

Conflicts:
	lib/PRTween.h
	lib/PRTween.m
A bit of code cleaning/reformatting after last merge with upstream