Split css base64 encoded images (emojify.css and emojify-emoticons.css)

File emojify.css is too big, so I changed gruntfile to build separate css (one w/ all, and one w/ emoticons only, but we could also add people, nature, objects). Also used grunt-datauri to create css.
Aren't there loads of emoji names missing here? See https://github.com/hassankhan/emojify.js/blob/master/emojify.js#L29