- add support for PyCrust-style _getAttributeNames magic method. Closes #50.
- don't delete exit/quit. Closes #55.
- rename 'with' to 'with_obj' to avoid problems in python 2.5. Closes #53.
- fix FakeModule, which also closes #59.
- add -n option to %edit.
- fix various other crashes reported by the automatic crash handler.