Bug 764261: Fix still broken moz.org/zh-TW/ redirects.

Also fix several rules that were forcing many URLs to
be en-US only. Bedrock now takes care of deciding which
pages to redirect to the default lang (en-US) and which
to display as translated as of bug 794059. Allowing all
locales to pass through to bedrock for the ones that were
redirecting all locales to en-US will enable our l10n
managers to turn on locales on a per-page basis without
the need for a code push.
Merge pull request #605 from pmclanahan/bug-764261-fix-still-broken-redirects

Bug 764261: Fix still broken moz.org/zh-TW/ redirects.
Bug 755826: Add redirect for zh-CN home page.
Merge pull request #606 from pmclanahan/bug-755826-redirect-zh-CN-home

Bug 755826: Add redirect for zh-CN home page.
Merge remote branch 'mozilla/master' into bug-796049-video-slideshow
[Bug 833376] Add Phones/Tablets headings
Merge pull request #607 from sgarrity/bug-833376-devices-headings

[Bug 833376] Add Phones/Tablets headings
Bug 834276 - text edits to MWC page

s/carriers/operators
s/OEMs/phone manufacturers
Remove Fabook social-api promo from firstrun
Merge pull request #608 from craigcook/bug-834276-mwc-text-edits

Bug 834276 - text edits to MWC page
Merge pull request #609 from sgarrity/cleanup-firstrun

Remove Fabook social-api promo from firstrun
[fix Bug 764261] zh-TW accept language redirect for download page
Merge pull request #610 from Sancus/zhTW-redirect

[fix Bug 764261] zh-TW accept language redirect for download page
Add space-bar keycode handler for role=button elements. Move continue/replay actions into reusable functions.
Define sources as a shared variable so they can be passed directly to the SWF player. Set SWF location.
SWF location is now set in the JS.
Merge from sgarrity. Includes new video source locations.
Show share overlay on pause.
Merge remote branch 'gauthierm/bug-796049-video-slideshow' into bug-796049-video-slideshow
Make :focus outline more visible on controls