Collapse job search

this adds the ability to handle collapsed job searches to the ruby api gem.  If collapse is off it will handle everything as it used to. But if collapse is on, it will go down the collapsed path and return a Cb::Models::CollapsedJobResults insted of a Cb::Models::JobResults
Newline at the end of file! We've gotten into this habit, I think just because github makes this little red mark in the diff if you don't :confetti_ball: :lantern: