[BUGFIX] Clone response and re-process in Flux sub-Controller class

This bug fix addresses a problem with using the $this keyword from within FluxControllers; methods would be called statically and would be missing a class context. Fixed by cloning the response and using processRequest to execute the desired controller if the extension name is different from the host extension.
Merge pull request #95 from NamelessCoder/subrequests

[BUGFIX] Clone response and re-process in Flux sub-Controller class