Explanation for ownerOf()

[thomasoss]

In the code of CreatureFactory.sol I think the explanation for ownerOf() is copied from the explanation of isApprovedAll(). A short explanation what ownerOf() is used for would be useful. Below the code piece I'm talking about
/**
* Hack to get things to work automatically on OpenSea.
* Use isApprovedForAll so the frontend doesn't have to worry about different method names.
*/
function ownerOf(uint256) public view returns (address _owner) {
return owner();
}