Adding $refundPath and createRefundtoken to tokenFactory
Changing refundPath to last position of Signature
Making afterPath optional on createRefundToken
Calling refundPath on TokenFactory parent contructor call
Correcting TokenFactory calls on tests
Correcting GenericTokenFactory calls on tests
Passing refundPath to parent contructor call on GenericTokenFactory
Making afterPath optional on Token Factory interface
[paypal-pro] refund.
Merge remote-tracking branch 'payum/master' into paypal-pro-refund
fix tests
[docs] add chapter about refund.