Added callbacks 'onAfterSuccess' and 'onAfterComplete' that can be used in tests to check specific conditions.
Merge branch 'master' of github.com:appendto/jquery-mockjax into onComplete-executed-callback
Fixed indentation
Added 'onAfterError' callback in line with others
Added line for onAfterError option and example usage of onAfterComplete
Fixed up code formatting
Refactored onAfter[X] logic to centralize overriding
Merge pull request #173 from appendto/onComplete-executed-callback

onAfter[Action] callback method options