add posibility to remove reference number from package
add payment information to shippment
unify shopRates() and getRates() in Rate class
fixed setting the service code
added the actual service name to the service::getName() method
updated names of services
removed references to service->Code
setting charges->monetaryValue to a float
add RateInformation, add showNegotiatedRates()

- returns discounted prices
fix: bug in constructor while using deprecated variables
fix: correctly render address XML even if not all parameters are set
fix: correctly render ShipFrom XML even if not all parameters are set
add Dimensions to package class
add InsuredValue to the Package class
Merge pull request #13 from kraag22/master

add new definitions, bug fixes