section 11.1.2 -- set up associations; note much of this not yet clear!
added validations -- section 11.1.3
section 11.1.4 -- up thru unfollow!
added in reverse_relationships & followers
section 11.2.2
section 11.2.3
section 11.2.4
section 12.2
section 11.3.2 -- can't believe that final trick actually worked!!!
status feed with subselect