Make subject line of contribute email for end-users localizable.

Keep the existing filterable subject lines for Mozilla contacts.
Fixes 854992
Bug 912055: Update basket-client
Bug 912055: Support invalid email errors from basket.
Bug 900426 - tabzilla.js: 200 instead of 304
Bug 900426: Add tests for new decorator.
Fix Bug 943934: Update Vagrant Version, Add MySQL Pre-Req, Update Documentation

Removed commented out code.
Fix Bug 795970 - using lowercase locales in url leads to 404
Bug 968127 - Improve home page at 320px width
Merge pull request #1661 from flodolo/bug968127

Bug 968127 - Improve home page at 320px width
Add updated schedule to MWC preview page. Bug 957763.

- Schedule HTML/CSS in includes for easy implementing elsewhere.
Merge pull request #1662 from jpetto/bug-957763-mwc-preview-schedule

Bug 957763 mwc preview schedule
Fix Bug 958239 

Delete "Forum" for Mozilla Switzerland community on "Where is Mozilla?"
Bug 892470 - Enable /new for he
[bug 968039] Workaround for first highlight position in tour
Merge pull request #1666 from flodolo/new_he

Bug 892470 - Enable /new for he
Merge pull request #1665 from jfelker06/patch-1

Fix Bug 958239
[fix bug 930752] Add Firefox and you signup form to new page
Fix Bug 968831 - fix broken img url on Gigabit Site
Bug 968851 - Make changes to blog link
Fix Bug 527907 - Expose x86_64 Linux builds on the download pages