Add fallback background-color for .masthead

In IE9, .masthead was displaying as blank. The background was only styled with gradients. I've added a fallback background color for those browsers that don't support gradients. I chose the darkest of the gradient colors used as it has the highest contrast rating for any size text (http://leaverou.github.com/contrast-ratio/#%23fff-on-%231a274e).
Add fallback background-color for .masthead

In IE9, .masthead was displaying as blank. The background was only styled with gradients. I've added a fallback background color for those browsers that don't support gradients. I chose the darkest of the gradient colors used as it has the highest contrast rating for any size text (http://leaverou.github.com/contrast-ratio/#%23fff-on-%231a274e).
Merge pull request #76 from keithwyland/patch-2

Add fallback background-color for .masthead
Add Keyboard Navigation with Access Keys post
Merge branch 'gh-pages' of github.com:erunyon/a11yproject.com into erunyon-gh-pages
extended the alt quick tip description
Fix one letter typo
Consider an alternative Contrast Checker

http://leaverou.github.com/contrast-ratio/ is a contrast checker that uses HTML, CSS, and Javascript to check WCAG compliance without requiring Adobe Flash.
Added Contrast Ratio Checker to Resources Page
Update about.md

Two ones we missed.
Merge pull request #82 from thomassjogren/patch-1

Update about.md - new name
Merge pull request #81 from GuilhermeSimoes/patch-1

Fix one letter typo
Changed simplea11y.com to a11yproject.com

Post has old domain name in an alt="" and at the end of the text.
Merge pull request #83 from keithwyland/patch-2

Change simplea11y.com to a11yproject.com
Unpublishing Access Keys post

Based on feedback (found) on Twitter, this isn't awesome.
Form breaking typo fix
Resources beef-up
merging upstream