Merged in krzysiek_gzocha/fork-payu (pull request #1)

Basic configuration + models
Merged in krzysiek_gzocha/fork-payu (pull request #2)

Przykład ProductCollectionTransformera
Unit testing ProductCollectionTransformer on real example
GeneralTransformer with unit test + cs fixes
small fixes
Omiting additional architecture layer
AnnotationsExtractor replaced with Extractor + AnnotationReader
Small fix
Fixing extractors spec
better extractor spec
Added tested wercker
Wercker status in readme.md
Buyer and Invoice transformers
DeliveryTransformer + unit tests
Buyer, delivery and invoice can now be in separate entities
configuring timezone in wercker
simplifing architecture
testing support() method
Small fixes + urls transformer
ShippingMethodCollectionTransformer