exclude feeditems if specify carrier but don't match carrier (feed)
mark notes as approved public waiting (bug 998011)
add gravatar hash to comm serializer (bug 998004)
move constants.comm to comm.constants
Revert "move constants.comm to comm.constants"

This reverts commit 804807c876f3273df5194221874ad6a137229951.
developer comment note type (bug 997993)
add extra note type validation, update comm docs (bug 1028758)
fix tests from when unused helpers removed
include perms in notes count (bug 997988)
order comm notes in revtools by oldest first (bug 1028757)