Update mechanize requests for imgur api v3

Imgur now requires a client id for read-only api requests, plus the urls
have changed. Before deploying you will need to add an "imgur_client_id"
to the configuration or else all Cute commands will fail.
more cute animal brains

not enough cute animals, must eat !sloth, !guinea-pig, and !bunny
Merge pull request #16 from jackiekircher/make-cute-again

fix cute commands