Issue 3735: misbehaving tag sets
Issue 3304: expire chapter header when work authorship is updated
Merge pull request #1307 from elzj/issue_3304_chapter_header_caching

Issue 3304: expire chapter header when work authorship is updated
Merge pull request #1306 from CristinaRO/098-issue-3735-tagsets-misbehave

Issue 3735: misbehaving tag sets
Update to CSS syntax for yuletide tests
Tweaking errors controller to load correct 500 page
Merge pull request #1309 from elzj/issue_3663_errors

Tweaking errors controller to load correct 500 page
Set type for private in bookmark mapping to fix query problem
Merge pull request #1311 from elzj/bookmark_mapping

Set type for private in bookmark mapping to fix query problem
Merge pull request #1308 from scottsds/challenge_test_updates

Update to CSS syntax for yuletide tests