(PE-3025) Change to dev resources

I've changed over this repo to use dev-resources instead of test-resources as per ticket PE-3025. This required changing the directory name, switching over all instances of test-resources to dev-resources, and updating the version of TK being used, as TK version 0.3.3 had a direct reference to the test-resources directory.
Another IDEA project file that shouldn't be added.  :)