team: uses PermissionType instead of int64 for permissions.

pkg/services/sqlstore/team.go

@@ -271,6 +271,7 @@ func UpdateTeamMember(cmd *m.UpdateTeamMemberCommand) error {
 			return m.ErrTeamMemberNotFound
 		}
 
+		// TODO: check to make sure that permission is a legal value
 		member.Permission = cmd.Permission
 		_, err = sess.Cols("permission").Where("org_id=? and team_id=? and user_id=?", cmd.OrgId, cmd.TeamId, cmd.UserId).Update(member)