Revert the semantic change to Controller.Action and add MethodName instead
Bugfix for intercept filter: Re-panic after PANIC filter
Update db module for new filter stuff.
Params surgery: Split out the types of params and provided a unified view

This allows the Params Filter to be moved after the RouterFilter, which
allows it to be subject to the FilterConfigurator.   It will also help
when we extend Params to handle JSON and XML params.