removed deprecated method generateAuthTokenFromUsername:password: (from the Last.FM API docs: "support for authToken will be removed in the future")
added convenient FMEngine factory method
in urlEncodedStringWithParameters: won’t encode key anymore as it can contain [] (e.g. when batch scrobbling) & removed unnecessary sorting operation
FMEngineSession enhances FMEngine with an encapsulated session concept.
A FMEngineSession then offers convenient methods to execute specific Last.FM API calls.
updated the example app to show the new classes & functions in use