Bug 925278: New locales for Channel page redirect

Added locales: an, az, br
Fix bug 952588 - remove survey from stub installer fallback page

An updated survey will return soon so just commenting out for now.
Remove unnecessary query strings from SUMO article links
Merge pull request #1554 from flodolo/channel_page

Bug 925278: New locales for Channel page redirect
Merge pull request #1557 from craigcook/bug-860873-stub-installer-survey

Bug 952588 - remove survey from stub installer fallback page
[fix bug 952965] Update MozTW information in community page
Merge pull request #1562 from alexgibson/update-moztw-info-in-contact-page

[fix bug 952965] Update MozTW information in community page
Merge pull request #1561 from kyoshino/bug-956392-unnecessary-query

Fix 956392 - Remove unnecessary query strings from SUMO article links