Extension for the Ownable contract, where the ownership needs to be claimed. This allows the new owner to accept the transfer.
Modifier throws if called by any account other than the pendingOwner.
function claimOwnership() public
Allows the pendingOwner address to finalize the transfer.
function transferOwnership(address newOwner) public
Allows the current owner to set the pendingOwner address.
newOwner- The address to transfer ownership to.