Make signiture block less missable

Added some asterisks and took out the redundant MKT_SUPPORT_EMAIL to make it shorter.
Include 'url' in the fields for serializers inheriting from HyperlinkedModelSerializer

This fix test failures introduced by the upgrade to django-rest-framework 2.3.6
or higher. See https://github.com/tomchristie/django-rest-framework/commit/4ad10949687c271fed930cd1142aa23cd8c20b2b
retroactively reward theme reviewer points for old theme revs (bug 909985)
Merge pull request #1066 from ngokevin/themebrownies

retroactively reward theme reviewer points for old theme revs (bug 909985)
Globally change pagination limit (bug 911175)
Always force issuer for persona login (bug 910938)
Merge pull request #1072 from kumar303/forced

Always force issuer for persona login (bug 910938)
Merge pull request #1074 from eviljeff/patch-2

Make signature block unmissable
Added region to install logging data (bug 911327)
Extract/compile script.  Today's lucky number is 28090.
Added apps_installed stats API (bug 910364)
generate BUILD_IDs for Fireplace so we can cachebust so we can push Fireplace without having to push Zamboni afterwards!
read from media.fireplace module for cachebust IDs
generalise module for importing cachebust IDs
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