documented Spack installation in install docs
documented Spack installation in install docs

amandalund/openmc,amandalund/openmc,amandalund/openmc,shikhar413/openmc,shikhar413/openmc,walshjon/openmc,shikhar413/openmc,shikhar413/openmc,walshjon/openmc,walshjon/openmc,amandalund/openmc,walshjon/openmc