Issue #1360416 by droplet, LSU_JBob: Fixed Document that the page_bottom() region is hidden from the blocks UI.
Issue #1360416 by droplet, LSU_JBob: Fixed Document that the page_bottom() region is hidden from the blocks UI.

rmcveigh/frontend-dev,joshkoenig/golden-god-demo,edutrul/social-web,edutrul/social-web,brainhell/drupalglass,brainhell/drupalglass,brainhell/drupalglass,edutrul/social-web,lincgr/Prueba,OccupyWallStreet/streetnet,brainhell/drupalglass,OccupyWallStreet/streetnet,brainhell/drupalglass,OccupyWallStreet/streetnet,joshkoenig/golden-god-demo,joshkoenig/golden-god-demo,rmcveigh/frontend-dev,joshkoenig/golden-god-demo,joshkoenig/golden-god-demo,edutrul/social-web,lincgr/Prueba,lincgr/Prueba,joshkoenig/golden-god-demo,lincgr/Prueba,rmcveigh/frontend-dev,OccupyWallStreet/streetnet,joshkoenig/golden-god-demo,edutrul/social-web