added inline option to swap tally method
added inline option to swap tally method

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