Fix missing <content> block for group writes (causing write errors)
Test for 'full' response to group writes
Allow 'author' creator type in JSON for all item types
Include JSON in API v1 collection writes
creatorSummary tests
Avoid PHP notice on empty 'relations' array
Fix extreme slowness of negated tag search
Use case-insensitive comparison for item tag search
Fix error if 'q' is used along with 'itemKey'
Include HTTP method in debug log
Make item caching safer, and cache sync XML for items
Don't overwrite content type and charset on client file sync (schema change)

Also, don't cache sync XML for imported attachments
Let's use an index, shall we?
Fix returned error message for 412
Fix server-side translation response for API version 1

(And version 2 needs to be fixed too)
Catch "MySQL server has gone away" with MySQLi too and exit properly
Allow If-Unmodified-Since-Version to be 0
Remove quotes in error message to match test
Update shard.sql to match live schema
Settings sync, via classic sync and API [schema change]

Restricted to the 'tagColors' setting for the moment