Merge pull request #7 from bmatthias/master

Rebuilt and fixed FieldValueTransformer
rebuilt FieldValueTransformer
added StringToPrimitiveTransformer
removed unnecessary transformers
fixed FieldSetter
fixed tests
simplified FieldValueTransformer algorithm
more advanced type matching in ClassCastingHelper
simplified FieldValueTransformer algorithm
more advanced type matching in ClassCastingHelper
Merge pull request #1 from TNG/master

rebuilt FieldValueTransformer