digest works!

added some nice backwards compatible stuff too
no staticmethod
cleanup
remove iter_json, don't want to commit to it
fix params support
nice and cleanup
__attrs__
fix cookies
return_response
generator rejection
 urlparse(url)
docstrings
remove bunk
/s/prefetch/stream
apparent_encoding
Connection Adapter Mounting!
tension
proxy manager
remove all old tests
basic test