Missing icon classes

[c-spencer]

You're missing some of the new bootstrap icons, which start at 144px y position (.icon-hdd -> .icon-fullscreen).

Thanks for this project by the way, perfect timing for a project which is using the new Microsoft style.

[ace-subido]

got it, will include this on the next push. thanks!

[c-spencer]

Also, a dark button colour similar to bootstrap (.btn-inverse) would be helpful (though I guess may not fit into the style as a whole?)