Update event comment cache count on new comment.
Remove event_comments joins, and keep num_comments field in output.
This ensures BC with API v1.
Update cached talk count upon adding new talk.
Update cache talk count when deleting a talk.
Update track cache count for add/delete.
Update cache on deleting comment.
removing the blog menu item since the blog is inactive
Merge pull request #790 from lornajane/no-blog

removing the blog menu item since the blog is inactive
Merge branch 'richsage-cache-counts'