inferencer rewrite
inferencer rewrite

topic inference facilities added in from my standalone script. This now
returns a model object of its own.

agoldst/dfrtopics,agoldst/dfrtopics,agoldst/dfrtopics,agoldst/dfrtopics,joncgoodwin/dfrtopics,agoldst/dfrtopics,joncgoodwin/dfrtopics,joncgoodwin/dfrtopics