Bug 893144 - /newsletter/existing/ styling

The styling sheet on /newsletter/existing ws messed up - the
descriptions were all bolded and the newsletter titles were small.

Reverted styling of the TH part of the table to what it was in an
earlier version of newsletter.less. No way to tell what happened
to it due to rebasing on the original branch.
Update remaining pages from jquery 1.4.4 to 1.7
Bug 893854
The /firefox/speed, /firefox/happy, and /firefox/geolocation pages having had
their legacy use of jquery 1.4.4 removed. All three pages work fine with 1.7.
Also fix a typo in nav-main-resp.js
Merge pull request #1073 from sgarrity/bug-893854-geolocation

Update remaining pages from jquery 1.4.4 to 1.7
Merge pull request #1072 from dpoirier/bug-893144-newsletter-existing-styling

Bug 893144 - /newsletter/existing/ styling
Fix bug 893187 - Add Optimizely code snippet to mozilla.org homepage
Merge pull request #1075 from craigcook/bug-893187-optimizely-home-page