Fullscreen Support

This is a beta support for fullscreen. I was working on my project and would be nice to have a fullscreen feature so I added one. :smile: 

Here is sample plunk: http://embed.plnkr.co/atyuBnVNktl8YSfdfPJT/preview
You should also add the other supported icon libs like fontawesome and fontawesome v3 like the rest of the buttons