Start building callback classes
Simplify the CV2AVSResponse class
Callback class now complete
Fixes to tests
Coding style fix
Fix small issue in constructor test
Fix namespace for callback classes
Merge pull request #4 from tomphp/development/add-callback

Create Callback data objects
Started processing callbacks [broken]
Implemented processCallback
Implemented processCallback
Improve coverage
Working on tidying up the options
Merge pull request #5 from tomphp/development/process-callback

Development/process callback