contract Ownable {

  address public owner;

 

 

  event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);

 

 

  /**

   * @dev The Ownable constructor sets the original `owner` of the contract to the sender

   * account.

   */

  function Ownable() {

    owner = msg.sender;

  }

 

 

  /**

   * @dev Throws if called by any account other than the owner.

   */

  modifier onlyOwner() {

    require(msg.sender == owner);

    _;

  }

 

 

  /**

   * @dev Allows the current owner to transfer control of the contract to a newOwner.

   * @param newOwner The address to transfer ownership to.

   */

  function transferOwnership(address newOwner) onlyOwner public {

    require(newOwner != address(0));

    OwnershipTransferred(owner, newOwner);

    owner = newOwner;

  }

}
/**
 
 * @title Ownable
 
 * @dev The Ownable contract has an owner address, and provides basic authorization control
 
 * functions, this simplifies the implementation of "user permissions".
 
 */
function Ownable() {

  owner = msg.sender;

}

/**
 
 * @dev The Ownable constructor sets the original `owner` of the contract to the sender
 
 * account.
 
 */