Merge pull request #1158 from ngokevin/revsearchmobile2

prettify mobile app search results (bug 850687)
Bump app-validator

Includes major performance improvements
update buckets.js
django-rest-framework now includes the specified patch
add new languages; bug 927565
remove legacy Featured Apps tool (bug 927171)
remove category supervisors (bug 927171)
bump migration
remove has_payments (bug 886503)
Merge pull request #1257 from andymckay/886503

remove has_payments
Bump app-validator (bug 926613)

This vastly decreases the number of CSP warnings generated and slightly improves performance.
add new region (bug 922252)
Bump app-validator

Now ignoring JS files larger than 1MB.
rename status terms for clarity ( bug 895560)