Move the predicate functions in to their own ns -- it seems likely that we'll wind up with a bunch of these. Also, remove the note about expecting a java.io.File from the docstrings -- our schmancy multimethod `is-type` obviates that.
Move the predicate functions in to their own ns -- it seems likely that
we'll wind up with a bunch of these. Also, remove the note about
expecting a java.io.File from the docstrings -- our schmancy multimethod
`is-type` obviates that.

Gastove/doctopus