Update readme.
Update client code.
Update .gitignore.
Update register method.
Update test fixtures.
Update client.
Handle json parse errors better.
Update test utils.
Update client.
Remove unused idFromUrl stuff.
Update tests.
pep8.
Bump version.
Also run tests with PyPy.
Revert "Also run tests with PyPy."

This reverts commit 9fac31c8f7cb916aafbd5912198b79afe36abd8f.
Merge pull request #7 from racker/remove_session_concept

Remove session concept