Adding Transaction class from old CRS
Adding  class from old CRS
Adding `Merchant` and `AuthnetResponse` classes from old CRS
Adding `Customer` class from old CRS
Adding `Invoice` object from old CRS
Adding `GatewayConfiguration` and `TransactionResult` classes from old CRS
Adding `Method` and `HttpProvider` classes from old CRS
 - Also fixing something in `Transaction`
bracketology
bracketology
bracketology
Replacing `Contract` calls with `Preconditions`
Adding `Auth` class from old CRS
Changing another `Contract` call to `Preconditions`
Adding `PostalAddress`, fixing broken import in `Customer`
adding more classes from old CRS
Removing an interface abstraction not needed at this time.  It can easily be recreated again if it becomes relevant
Making this class fluent
Adding a HttpProviderImpl that will actually talk to auth.net
Setting some authorize.net properties
create a class to transate our `Conference`,`Payment`,`Registration` objects into objects that know how to talk to authorize dot net
 - Use it in `RegistrationResource`