Minimal changes to make code import on Python 3.
More changes to make Python 3 tests pass.
More fixes for Python 3.
More passing tests on Python 3.
Tests pass on Python 2 again.
More passing Python 3 tests.
Try to add 3.3 support to Travis configuration.
Changelog entry.
Add Python 3 classifiers so users know this supports Python 3.
Advertise version support in README.
Get rid of extra fields for failures within the Action layer.
Rip out failure fields from the validation layer.
Switch all imports to be relative.
Get rid of failure fields in documentation.
Fix tests on Python 3.
Remove some no longer accurate docs.
Address review comment: explain the Python 3 issue better.
Address review comment: Note a particular issue with ujson.
Suggest way of including additional information in failed actions.
Address review comments: Slightly better docs.