add some missing test coverage for WPManager
fix how fetching from resource did not update existing items
fix get_or_create_from_resource did not update foreign key relations
expand 'make clean' to remove .tox so I can rebuild virtualenvs easier

also move find ... to the end to reduce the amount of work it has to
do
Merge pull request #18 from texastribune/fix-resource-did-not-update

Fix resource did not update