[ANN] PyStar 0.1 -- A* graph search algorithm

[Glenn Hutchings]

Announcing PyStar, a python module implementing the A* graph search
algorithm.  Available under the GPL, you can find it at

    http://fluffybunny.memebot.com/pystar.html

I tried to find a decent Python version of this on the Interweb, but the
only one I found (http://arainyday.se/projects/python/AStar) was just a bit
too cryptic for me to understand and use.  So I knocked this up from
pseudocode on the Wikipedia A* page, and rewrote the AStar demo program in
Tkinter.

Comments, bug reports, big wads of cash, etc., are welcome.