Updating emojione

Generate new category map variable for emojipicker

Update the variable emojiList in the file generateEmojiIndex.js with the content of the file https://github.com/Ranks/emojione/blob/master/emoji.json

After that, run:

node generateEmojiIndex.js

Grab the result and update the file emojiPicker.js.

Generate new percentage sprite

Clone the repository https://github.com/Ranks/emojione/ and replace the file assets/sprites/emojione.sprites.mustache with the content of emojione.sprites.mustache, then run at emojione folder:

grunt sprite
sass --sourcemap=none assets/sprites/emojione.sprites.scss sprites.css

And replace the file sprites.css at Rocket.Chat's /packages/rocketchat-emojione/sprites.css.