Formatted font hints

Uses the formatting capabilities (implemented in adobe/brackets#2427) of the [new code hinting api](https://github.com/adobe/brackets/wiki/New-Code-Hinting-API-Proposal) to render the fonts in the font hint list using their associated font families. 

Note that this pull request supersedes a previous pull request, #57, which narrowly addresses issue #56 by updating the EWF extension to use the new code hinting API, but only with simple, unformatted hints.  

Here's a picture: ![Fancy font hints](http://f.cl.ly/items/0y1Q0W3M170h0v1J1x0M/Screen%20Shot%202012-12-21%20at%203.39.27%20PM.png "Fancy font hints")