New demo class, very handy for interactive presentations.

Revert Shell.py changes, they don't work.

Minor fixes in genutils, and a BIG fix for threading. I _think_ I got Ctrl-C to work in the threaded shells, and the solution is in fact absolutely trivial. The new code is _much_ simpler than what we had! This needs testing, because I find it almost hard to believe that we hadn't tried this before. But if it works, great! The only limitation is that in threaded mode, the traceback shows the internal sigint handler frame. Big deal, it's just cosmetic.

Fix extra newlines in autocalling.

Close issue 41, remove obsolete gtk 1.x code, trap os.getcwd exceptions at init time.

Simple change to add svn revision info at the top level and crash handler. Useful for debugging.

Added .complete() method to ipython. This exposes the attribute completion machinery which normally only readline sees. It will be useful to Brian for the remote kernels, and also for the GUIs to do tab completion. Please merge into chainsaw/tzanko branches.

Testing post-commit hooks...

Trivial test for svn post-commit hooks

Update version strings to use only dots as separators, since either - or _ will break one of bdist_rpm or bdist_deb, so we must avoid both.