We no longer need to be concerned about the manual setting of entity
table aliases (e.g. to avoid duplication between entities, or for using
a single entity multiple times), as it's handled transparently for us.
The ability to report on blog comments was added in 27ebde57, however
it lacked the option to report on the user who added the comment(s).
AMOS BEGIN
CPY [author,core_notes],[author,core_blog]
AMOS END
Create entity definition containing report elements for blog posts.
Add new report source joining the entity to existing user, course
and tag entities to provide data for the reportbuilder editor.