ARGO-304: gather test coverage
ARGO-304: replace calls to the mock method with calls to the double method.  replaces instances of 'be_true' with 'be true'.  replace instances of 'be_false' with 'be false'.  change an empty test that would've passed from 'pending' to 'skip'.
added call to config.infer_spec_type_from_file_location! (e.g., so that the post method would be defined in controller-related tests
ARGO-304: actual upgrade from rspec 2 to 3
ARGO-304: added test jpeg for the a couple file upload tests
ARGO-304: fixed add_file and replace_file tests to use a viable approach for mocking uploaded files
ARGO-304: make failing tests (for visiting root_path) into pending tests
ARGO-304: get rid of rspec/autorun since it triggers a deprecation warning and isn't needed