added support for deleting Application Plan
added support for reading Application Plan
added another case of a success response
corrected package structure for response objects
removed the notion of response objects as they can be used for requests as well
updated constants name, made them shorter and more conistent
Rethought/Refactored for the AccountAPI that we need specialized Response objects for each return type. Instead we just have one Response object typed by the object that is expected as a result. This should eventually also be done for the Service API.
added support to list application plans, corrected javadoc references
added support for creating application plans