[bug 997080] Update tabzilla URLs.
[bug 997080] Add .htaccess for media caching.
[bug 921107] Update email in exact target

When someone changes their email in Mozillians.org, move their exact
target subscriptions to the new email address.

Also take advantage of new basket subscribe(sync=Y) to simplify
the update tasks.
[fix bug 921107] Update email in Exact Target.
Added note about node version issues for less.
Merge pull request #917 from chefscott/doc_edit

Added note about node version issues for less.
Merge pull request #918 from hoosteeno/master

Fix broken links in docs
[fix bug 996923] Upgrade to Django 1.5.6
Merge pull request #919 from glogiotatidis/upgradedjango

[fix bug 996923] Upgrade to Django 1.5.6
Merge pull request #903 from glogiotatidis/optimize

[bug 997080] Moar speed!
Merge pull request #872 from glogiotatidis/921107

[Fix bug 921107] Update email in exact target
[fix bug 962172] Add LinkedIn to External Account types.
[fix bug 1000869] Add link to /groups in nav-menu.
Merge pull request #923 from glogiotatidis/1000869

[fix bug 1000869] Add link to /groups in nav-menu.
[fix bug 1000940] Re-add menu ids.
Merge pull request #925 from glogiotatidis/ids

[bug 1000869] Re-add menu ids.
[Bug 1000940] fix additional logout id
Add XMPP account type