Provide method details to delegate, and begin()/end() calls

[Byron]

When calling the delegate, currently the only information it gets about the method it should handle is its name.
As the delegate can be seen as state-machine, it would benefit from knowing more about what's going on. There should be information about a method that is passed to it right at the beginning, and it should be informed as well when the method is done executing, passing in the result for inspection.

Even though the begin()/end() calls are not strictly required as the user knows when he is calling into the API and returning from it, it will nonetheless make handling API work more convenient.

[Byron]

You can watch the development stream on youtube.