Reinstated check before updating comments
Tested .faves_from_flickr. Stubbed it out of other tests. Rewrote to use total attribute.
Tested .update_comments. Mocked it out of other tests.
Stringify FlickrService method option keys and values. Use symbols and numbers in callers.
Minor refactoring of FlickrUpdater
Inlined FlickrUpdate.create_before_and_update_after
Added TODO
Implemented first example for update_tags