[bug 924655]  Add a facebook field on the user profile for MDN

Fixed the errors
fix block in installation debug section
Add an arrow to main nav items to just show dropdown
update l10n dashboard migration to 35
Wire up URLs for page deletion, restoration and purgation.
Merge pull request #1484 from groovecoder/l10n-migrations-fix

update l10n dashboard migration to 35
fix bug 924980 - Always show column hider
Merge pull request #1478 from darkwing/hide-column-924980

fix bug 924980 - Always show column hider
 Fix iPad/WebKit overflow on zone landing pages
Fix bottom margin issue on iPad
Better center alignment of homepage icons with RTL
Escape page titles in l10n dashboard
Merge pull request #1490 from Elchi3/escape-l10ndash

Escape page titles in l10n dashboard
Fix reverse column 1% offset within wiki article pages
Exclude redirect pages from l10n dashboard
fix and add tests
Additional instructions for manual installation
Merge pull request #1493 from nhenezi/additional-instructions

Additional instructions for manual installation
Merge pull request #1483 from sayanchowdhury/readme-fix

fix block in installation debug section
Merge pull request #1485 from darkwing/redesign-mobile-submenus

Add an arrow to main nav items to just show dropdown