Move wiki app.
Merge branch 'master' into move-wiki
Merge branch 'master' into move-wiki
Merge branch 'master' into move-wiki
Merge branch 'master' into move-wiki
Fix bug 1008698 and bug 777434 - Translation page improvements

Fix bug 1008698 - Add source code view for original article on translation page

Fix bug 777434 - Add a togglable one column editing mode on translation page

Change button names and position on translation page

Fix approved content margin on translation page

Update approved content source to use content_cleaned on translation page

Fix more nits
fix bug 775485 - welcome email tweaks
Merge pull request #2580 from iakshay/translation-source

Fix bug 1008698 - Add source code view for original article on translation page
Fix Travis config after merge conflict.
Merge pull request #2607 from groovecoder/change-welcome-email-from-775485

fix bug 775485 - welcome email tweaks
Merge branch 'master' into move-wiki
Fix a stray import.
Vertically center icons on homepage maps
Fix minor annoyances with login widget
Use $ for variable in content.styl
Merge pull request #2626 from darkwing/fix-table-blue

Use $ for variable in content.styl
Merge pull request #2623 from darkwing/login-widget-minor-fixes

Fix minor annoyances with login widget
Merge pull request #2621 from darkwing/homepage-icon-alignment

Vertically center icons on homepage maps
Delete "The Basics of HTML" link.

Please delete the "The Basics of HTML" link as the link is broken and is causing a 404 error.
Reverted some accidental changes done in c5f827baf3b9dc3db949ff768bae4f8fc374f10b that broke some admin templates.