allowing plot types to be reaction strings
allowing plot types to be reaction strings

shikhar413/openmc,paulromano/openmc,mit-crpg/openmc,amandalund/openmc,amandalund/openmc,walshjon/openmc,walshjon/openmc,walshjon/openmc,amandalund/openmc,shikhar413/openmc,amandalund/openmc,shikhar413/openmc,paulromano/openmc,walshjon/openmc,mit-crpg/openmc,shikhar413/openmc,paulromano/openmc,paulromano/openmc,mit-crpg/openmc,mit-crpg/openmc