Added script to propogate membranes
Added script to propogate membranes

openconnectome/open-connectome,openconnectome/open-connectome,neurodata/ndstore,openconnectome/open-connectome,openconnectome/open-connectome,neurodata/ndstore,openconnectome/open-connectome,openconnectome/open-connectome,neurodata/ndstore,neurodata/ndstore