Make remaining variables in simulation_header.F90 C interoperable
Make remaining variables in simulation_header.F90 C interoperable

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