PRTweenTimingFunctionQuintIn and PRTweenTimingFunctionQuintOut were inverted
Added a couple of additional shorthand methods to include delay with blocks
Fix for the hack to remove observers

(still a bit hackish though but at least now it doesn't mess up with the All Exceptions breakpoint)
Included some additional methods to include delay more systematically.
Formatted code for better readability (at least for me)
Added yet another method including a delay property.
Another method with delay
+ added a removeAllTweenOperations
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
Merge branch 'master' of github.com:gillesguillemin/PRTween into gillesguillemin-master

Conflicts:
	lib/PRTween.h
	lib/PRTween.m
	lib/PRTweenTimingFunctions.m