youtube-dl 2014.11.23.1

Closes #34408.

Signed-off-by: Tim D. Smith <git@tim-smith.us>
youtube-dl: update 2014.11.23.1 bottle.
Adding updated gifify formula
Updating gifify formula to use double quotes as per the Github Ruby style guide
Adding test for gifify
gifify: add 2.0 bottle.