Remove expression value once binned, save json
Remove expression value once binned, save json

Set the expression value of a gene to zero once binning has been established.
Added function to dump to json.

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