Add reverse transformations for CamelCase, llamaCase, snake_case, train-case
Fix selector for NSValueTransformer +allowsReverseTransformation
Merge branch 'master' of github.com:dmdeller/TransformerKit into dmdeller-master

Conflicts:
	TransformerKit/NSValueTransformer+TransformerKit.m
Minor refactoring and reformatting
Removing dead value
Adding ICU string transformer