Finish merging pull request
Merge pull request #1 from rory-geoghegan-ecometrica/master
Grandfatherson should happily handle datetimes that are timezone aware now.
Have it working when passing in a regular date.
Also pep8'd and pyflaked the files in question.
Filter now works on timezone aware datetimes
Fix typo in comments.
Added tag v1.0 for changeset bdaf00811921