Updated source and project for ARC
Removed redunant (under ARC) block accessors from string picker
Added ActionSheetCustomPicker and related files which allows for a finer control of the picker delegate and data source.  Updated project with an additional UI field demonstrating the new functionality.
Removed redunant ActionSheetPicker.h
Fixed mismatch in definition and declaration return value (void->IBAction)
Fixes LLVM warnings about string formats
Adds HKS to contributors
Merge pull request #37 from Club15CC/15cc-fork

Updated source and project for ARC