Made model a python subpackage
Made model a python subpackage

willu47/smif,nismod/smif,willu47/smif,tomalrussell/smif,nismod/smif,nismod/smif,tomalrussell/smif,willu47/smif,tomalrussell/smif,willu47/smif,tomalrussell/smif,nismod/smif