Support for new emojis like

[vaibhav-gupt]

Some of the emojis mentioned in github's emojis list(https://gist.github.com/rxaviers/7360908) doesn't work with this library. Eg :octocat:(:octocat:), :partly_sunny(:partly_sunny:)

[puzrin]

Take a look into page source. Those are non-standard extensions, without unicode chars, injected as images. That does not fit into current package simple concept. It's impossible to provide universal solution, when unicode emoji chars are mixed with bitmaps.