add upgradable instance factory and needed architecture

contracts/identity/Identity.sol

@@ -134,6 +134,7 @@ contract Identity is ERC725, ERC735 {
         public 
         selfOnly
     {
+        require(_minimumApprovals > 0);
         minimumApprovalsByKeyType[_type] = _minimumApprovals;
     }
 

contracts/identity/IdentityFactory.sol

@@ -0,0 +1,32 @@
+pragma solidity ^0.4.17;
+
+import "../deploy/Factory.sol";
+import "../deploy/UpdatableInstance.sol";
+import "./IdentityKernel.sol";
+
+contract IdentityFactory is Factory {
+
+    event IdentityCreated(address instance);
+
+    function IdentityFactory(bytes _infohash) 
+        Factory(new IdentityKernel(), _infohash)
+        public
+    {
+        
+    }
+
+    function createIdentity() 
+        external 
+    {
+        createIdentity(msg.sender);
+    }
+
+    function createIdentity(address _idOwner) 
+        public 
+    {
+        IdentityKernel instance = IdentityKernel(new UpdatableInstance(address(latestKernel)));
+        instance.initIdentity(_idOwner);
+        IdentityCreated(address(instance));
+    }
+
+}

contracts/identity/IdentityKernel.sol

@@ -0,0 +1,13 @@
+pragma solidity ^0.4.17;
+
+import "../deploy/InstanceStorage.sol";
+import "./Identity.sol";
+
+contract IdentityKernel is InstanceStorage, Identity {
+
+    function initIdentity(address _caller) external {
+        require(minimumApprovalsByKeyType[MANAGEMENT_KEY] == 0);
+        _addKey(bytes32(_caller), MANAGEMENT_KEY, 0);
+        minimumApprovalsByKeyType[MANAGEMENT_KEY] = 1;
+    }
+}