Bug 1084550: Flame Ads

Custom styles to support Flame ads macro. To test, copy https://developer.allizom.org/en-US/docs/Template:flame to your local dev and involk as {{flame(0)}} or {{flame(1)}}
bug 1072493 - Allow customizable domain runner via command line
Merge pull request #2839 from stephaniehobson/BUG-1084550-flame-ads

Bug 1084550: Flame Ads
Fix bug 1083463: Increase search letter-spacing
Merge pull request #2841 from darkwing/test-updates

bug 1072493 - Allow customizable domain runner via command line
Merge pull request #2834 from openjck/1083463-homepage-search-box-letter-spacing

Fix bug 1083463: Increase search letter-spacing
fix bug 899665 - add change update subscription link for parents of translated pages