Added tallying of nu-scatter-n and nu-scatter-pn
Added tallying of nu-scatter-n and nu-scatter-pn

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