cleaned up statepoint writing routines
cleaned up statepoint writing routines

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