Updates almost done;
Add grade tile grid to homepage; Change grade tile text color to blue/red on hover; Move promos down to site footer; insert feedback band into site footer; add "texts" link to main nav to anticipate texts section;
Remove promos; move feedback markup into site-wide footer; add feedback button to main nav;
Lighten footer feedback button.
Merge pull request #27 from fourkitchens/homepage-updates

Homepage updates
Merge pull request #28 from fourkitchens/master

merge master up