[IPython-dev] Python 3.3 compatibility - ready for review

[Thomas Kluyver]

I've got all the tests passing on a local installation of Python 3.3,
if anyone has time to review the pull request:

https://github.com/ipython/ipython/pull/1748

The bulk of changes are just for tests which relied on the order of
dictionaries (which was never guaranteed, and is now random). There
are also some functional changes relating to the new import system,
and the dict subclass we used for the namespace during testing is gone
- doctests now need to be run with globals that are an actual dict.

Thanks,
Thomas