created ability to short circuit the authentication process on a per resource basis

I would like the ability to turn off or short circuit the authentication process in certain circumstances. Doing this on a per Resource basis would fit my use cases nicely. Using it is as simple as adding the following to your Resource class.
    
    NO_TALON_AUTH = True

I tested this against the head of falcon and it works fine for me. ymmv.

I looked into writing a test or two for this but the project is using testing tools I am currently unfamiliar with. I did manage to get the suite to run and it did blow up with the following:

    $ testr run
    running=${PYTHON:-python} -m subunit.run discover -t ./
    ======================================================================
    FAIL: tests.auth.test_create_middleware.TestMiddleware.test_call
    tags: worker-0
    ----------------------------------------------------------------------
    Traceback (most recent call last):
      File "/vagrant/talons/tests/auth/test_create_middleware.py", line 86, in test_call
        self.assertEquals(None, m(req, None, None))
    TypeError: __call__() missing 1 required positional argument: 'params'
    Traceback (most recent call last):
    testtools.testresult.real._StringException: Empty attachments:
      pythonlogging:''
    
    Traceback (most recent call last):
      File "/vagrant/talons/tests/auth/test_create_middleware.py", line 86, in test_call
        self.assertEquals(None, m(req, None, None))
    TypeError: __call__() missing 1 required positional argument: 'params'
    
    Traceback (most recent call last):
    testtools.testresult.real._StringException: Empty attachments:
      pythonlogging:''

    Traceback (most recent call last):
      File "/vagrant/talons/tests/auth/test_create_middleware.py", line 86, in test_call
        self.assertEquals(None, m(req, None, None))
    TypeError: __call__() missing 1 required positional argument: 'params'
    Ran 31 tests in 0.069s (-0.004s)
    FAILED (id=1, failures=1 (+1))