MGXS Library now properly deep copies domains dictionary
MGXS Library now properly deep copies domains dictionary

mit-crpg/openmc,johnnyliu27/openmc,mit-crpg/openmc,shikhar413/openmc,wbinventor/openmc,walshjon/openmc,mit-crpg/openmc,samuelshaner/openmc,johnnyliu27/openmc,paulromano/openmc,johnnyliu27/openmc,shikhar413/openmc,liangjg/openmc,wbinventor/openmc,johnnyliu27/openmc,paulromano/openmc,smharper/openmc,liangjg/openmc,mit-crpg/openmc,walshjon/openmc,samuelshaner/openmc,liangjg/openmc,wbinventor/openmc,paulromano/openmc,bhermanmit/openmc,amandalund/openmc,samuelshaner/openmc,smharper/openmc,amandalund/openmc,walshjon/openmc,smharper/openmc,walshjon/openmc,wbinventor/openmc,shikhar413/openmc,samuelshaner/openmc,amandalund/openmc,paulromano/openmc,amandalund/openmc,smharper/openmc,bhermanmit/openmc,liangjg/openmc,shikhar413/openmc