emoji.coffee - Replaces :text: or text with emojis.
party_gifs.coffee - Make a GIF on the fly from search terms.
Use robot.brain to track less/more emoji toggle.

Remove scraping code & mention of jsdom dependency. Emojis
change infrequently, and this can be added back in when the emoji
data is more efficient to scrape.
Change mention of default behavior in documentation.
Merge pull request #631 from partyio/master

Add emojis and party gifs