Merge pull request #311 from carlomorgantinizynga/LabelShadowStroke

Label shadow stroke for CCLabelTTF
Merge pull request #312 from carlomorgantinizynga/LabelShadowStroke

ccFontDefinition (s) are now passed by value to CCLabelTTF
Using new JS bindings
Compiles on Xcode 5 & iOS 7
Fixes potential memory leak when the texture cannot be created
merge conflict