Google has apparently shut down the image search API.
A brobbot plugin for image searches.
brobbot image [me] <query>
query and returns 1st result's URL.
brobbot animate [me] <query>
query and tries to return the first animated GIF result.
Set the referer URL sent to the Google API (see https://developers.google.com/image-search/v1/jsondevguide).