Update on Pickling

As of this post, the latest svn revision, r148, has pickling support which is working great on the testbed. I'm rather excited about it, as it's somewhat of a powerful and unique feature.

For those who can compile the library, check out the testbed. It works like your regular quicksave (F5)/quickload (F7) system. There's an additional test, test_pickle.py, that shows how easy it is to load a pickled world. As far as the code itself goes, there's still some commenting to be done, but it should be readable.