added collection transformer
changed ITypeTransformer from interface to abstract class
changed FieldValueTransformer for multiple transformations
added exact generic matching to ClassCastingHelper
extended ConfigBuilderFactory with transformers
rebuilt FieldValueTransFormer
added StringToPrimitiveTransformer
removed unnecessary transformers
fixed FieldSetter
fixed tests
rebuilt FieldValueTransFormer
added StringToPrimitiveTransformer
removed unnecessary transformers
fixed FieldSetter
fixed tests
Merge pull request #7 from bmatthias/master

Rebuilt and fixed FieldValueTransformer