Mapping regex to function parameters

[BenjamenMeyer]

v0.8 introduced using regex to be able to register the end-point handler.
It could be useful, however, to use the regex functionality to assign portions of the URL to the functions parameters in order to not have to apply the regex twice.

The functions currently look like the following:

def my_handler(self, request, uri, headers)
      return (200, headers, 'hello')

Under this proposal, the functions could look like:

def my_handler(self, request, uri, headers, my_param1)
      return (200, headers, 'hello from {0}'.format(my_param1)

[BenjamenMeyer]

this could be handled a few different ways:

1. Inspect the target function's callspec to determine what parameters to provide
2. Update the registration function to tell it whether or not to forwards the regex group matches (if any) to the function. The registration might be able to validate that groups are part of the regex result as part of the process.

self.register(MyClass.my_handler, MyClass.PathMatchRegEx, forward_regex_groups=True)

Default would have to be False....something to think about.

[BenjamenMeyer]

This will be easier to implement and validate once Issue #71 has been completed.