GET /layertemplates/id: Show a specific item.

def show(self, id):
        """GET /layertemplates/id: Show a specific item."""
        # url('LayerTemplates', id=ID)
        lt = meta.Session.query(LayerTemplate).get(id)
        # use following query for getting a layertemplate owned by current user
        #lt = self._get_lt_from_user_by_id(c.user, id)
        if lt is None:
            abort(404)
        return lt.to_json()