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() public {
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) public onlyOwner {
require(newOwner != address(0));
OwnershipTransferred(owner, newOwner);
owner = newOwner;
}

}
function Ownable() public {
owner = msg.sender;
}
/**
 * @dev The Ownable constructor sets the original `owner` of the contract to the sender
 * account.
 */