added lots of tests plus support for running in MRI
added partial handling
fixed up tests and code for _path methods. These use plural/singular for the method names unlike the actual urls which are always plural.
Changed the code so that CalculatorsController now works
took path resolving out into a separate module
somewhat correctly handle params passed to collection path
got path all the way through go_to_route working
now ActionView gets controller's instance variables
link_to now accepts options