Just a couple of minor notes here for making sure this passes .ORG.
Font Awesome license:
Font Awesome's font is under the SIL OFL. However, its CSS is under the MIT. You'll want to note both in your readme.txt since you're including both in the theme.
Font Awesome 4.5.0 by @davegandy - http://fontawesome.io - @fontawesome
License - http://fontawesome.io/license (Font: SIL OFL 1.1, CSS: MIT License)
Image in screenshot:
If the image in the screenshot is a third-party image, make sure it's GPL-compatible and list its copyright and license info.
If you own the image, just make a small note of it in the readme to help the reviewer out.