add test for differing dimension fields as well as getting object
back from database
Move tracking transform to module level fixture
Fix up image fixture to make it more explicit
remove superflous test
Save height and width field (fixes #14)
add test for transforming scale both dimensions
make width even on tests to avoid rounding errors
Merge pull request #15 from saulshanabrook/fix/save-cached-dimensions

Save cached image dimension fields