Add NoOwner

contracts/ownership/NoOwner.sol

+pragma solidity ^0.4.8;
+
+import "./HasNoEther.sol";
+import "./HasNoTokens.sol";
+import "./HasNoContracts.sol";
+
+/// @title Base contract for contracts that should not own things.
+/// @author Remco Bloemen <remco@2π.com>
+///
+/// Solves a class of errors where a contract accidentally
+/// becomes owner of Ether, Tokens or Owned contracts. See
+/// respective base contracts for details.
+contract NoOwner is HasNoEther, HasNoTokens, HasNoContracts {
+}