fix(client): Fix the styling on outdated browsers.

* Show the "browse happy" link to IE < 9
* Make the firefox logo look respectable on IE < 9

fixes #999
fixes #1014
fixes #1098
issue #1095
fix(client): Disable IE9 support until we get IE9's CORS situation situated.

fixes #1126
Merge pull request #1099 from mozilla/issue-999-browse-happy

Fix browse happy text and the firefox logo on IE8, disable IE9 support.