Log 081117

I implemented a scheme for creating objects but I didn't add a safe scheme yet for destructive assignment.

For the moment I see three different approaches:

1. Ignore, just let cycles be created. This what I have now.
2. Detect cycle creation, and fail if a cycle would be created.
3. Conservatively copy, that part of the tree which holds the cyclic reference is copied.

I am also working a bit on an IRC bot but didn't progress very far yet.