Library.sol

contract CrowdsaleDAOFactory is DAOFactoryInterface {
    function createCrowdsaleDAO(string _name, string _description) public {
        address dao = DAODeployer.deployCrowdsaleDAO(_name, _description); 
        DAODeployer.transferOwnership(dao, msg.sender);
    }
}

library DAODeployer {
    function deployCrowdsaleDAO(string _name,  string _description) 
   returns(CrowdsaleDAO dao) {
        dao = new CrowdsaleDAO(_name, _description);
    }

    function transferOwnership(address _dao, address _newOwner) {
        CrowdsaleDAO(_dao).transferOwnership(_newOwner);
    }
}