Changes:
* Removed unnecessary types from the Functor by inferring from its types
* Removed inputs() function reference, replaced with .rows()
* Updated the forward constructor to use variadic templates
* Added optional parameters to the Fuctor for passing parameters,
control signals, etc
* Has been tested with fixed size and dynamic matricies
Ammendment by chtz: overload operator() for compatibility with not fully conforming compilers
6edd2e2851