contract Owned {

        /// @dev `owner` is the only address that can call a function with this
        /// modifier
        modifier onlyOwner() {
            require(msg.sender == owner);
            _;
        }

        address public owner;
        /// @notice The Constructor assigns the message sender to be `owner`
        function Owned() public {
            owner = msg.sender;
        }

        address public newOwner;

        /// @notice `owner` can step down and assign some other address to this role
        /// @param _newOwner The address of the new owner. 0x0 can be used to create
        ///  an unowned neutral vault, however that cannot be undone
        function changeOwner(address _newOwner) onlyOwner public {
            newOwner = _newOwner;
        }


        function acceptOwnership() public {
            if (msg.sender == newOwner) {
                owner = newOwner;
            }
        }
    }
function changeOwner(address _newOwner) onlyOwner public {
    newOwner = _newOwner;
}

/// @notice `owner` can step down and assign some other address to this role
/// @param _newOwner The address of the new owner. 0x0 can be used to create
///  an unowned neutral vault, however that cannot be undone