Clean up coverage tracking.
handlers: Decode username and password parameters.
Fix Python 2.x support.

Travis builds failed for 2.7 and PyPy.  Also added tox testing
support to help prevent regressions.
.travis.yml: Remove PyPy.

PyPy doesn't seem to like the async test stuff.  Each of the tests is
simply timing out.  I don't currently have it installed to test with so
I'm going to disable it for the time being.
Merge pull request #3 from dave-shawley/fetch-parameters

Fetch parameters