Remove all use of the join feature in low-level functions.
Remove all use of the join feature in low-level functions.

sorgerlab/belpy,bgyori/indra,sorgerlab/belpy,bgyori/indra,johnbachman/belpy,bgyori/indra,johnbachman/belpy,johnbachman/indra,johnbachman/belpy,sorgerlab/indra,pvtodorov/indra,pvtodorov/indra,sorgerlab/indra,pvtodorov/indra,pvtodorov/indra,johnbachman/indra,sorgerlab/indra,sorgerlab/belpy,johnbachman/indra