Added criticality information to HDF5 output.
Added criticality information to HDF5 output.

lilulu/openmc,shenqicang/openmc,shikhar413/openmc,liangjg/openmc,shikhar413/openmc,keadyk/openmc_mg_prepush,sxds/opemmc,smharper/openmc,mit-crpg/openmc,mjlong/openmc,amandalund/openmc,liangjg/openmc,walshjon/openmc,wbinventor/openmc,walshjon/openmc,paulromano/openmc,bhermanmit/openmc,paulromano/openmc,samuelshaner/openmc,samuelshaner/openmc,shikhar413/openmc,keadyk/openmc_mg_prepush,kellyrowland/openmc,johnnyliu27/openmc,shenqicang/openmc,smharper/openmc,keadyk/openmc_mg_prepush,kellyrowland/openmc,samuelshaner/openmc,wbinventor/openmc,walshjon/openmc,mit-crpg/openmc,lilulu/openmc,smharper/openmc,johnnyliu27/openmc,liangjg/openmc,smharper/openmc,mit-crpg/openmc,mit-crpg/openmc,johnnyliu27/openmc,amandalund/openmc,johnnyliu27/openmc,nhorelik/openmc,bhermanmit/openmc,amandalund/openmc,lilulu/openmc,amandalund/openmc,paulromano/openmc,samuelshaner/openmc,paulromano/openmc,nhorelik/openmc,shikhar413/openmc,wbinventor/openmc,bhermanmit/cdash,liangjg/openmc,mjlong/openmc,sxds/opemmc,walshjon/openmc,wbinventor/openmc