bug 1042820 (part) migrate mail sending functionality from apps/amo to mkt/site
fix feed tests
Merge pull request #2425 from eviljeff/movemailpy

bug 1042820 (part) migrate mail sending functionality from apps/amo to mkt/site
Bump app-validator (bug 1056231)
Comments on the Tarako review queue (bug 1053896)
Remove background_color from FeedShelf model (bug 1058163)