Merge remote-tracking branch 'origin/master' into test

Conflicts:
	corehq/apps/app_manager/static/app_manager/js/releases.js
	corehq/apps/app_manager/templates/app_manager/releases.html
Properly handle an empty build list
Dim the `make new version` button while querying
Merge branch 'build_button' into test

Conflicts:
	corehq/apps/app_manager/templates/app_manager/releases.html