Avoid circular reference by weak referencing kid's parent
Remove Stanza once callback called to avoid memory ballonning

Deleting session._expected[ID] when the callback will be processed
avoid this dict to grow over the time.
Better ID uniqueness generation
Prune debian stuff, update README, move IETF doc
Update repo structure
Prune the doc and Makefile
Remove examples and put sources to the root
Update setup.py, Remove useless files

We can now use the lib as a git submodule or deploy using setup.py
Merge pull request #1 from CyrilPeponnet/archipel-fork

Refactoring xmpppy repository