Squirtle: Final pre-competition release

In anticipation of the competition, I've done a final release of Squirtle, our SVG mini-library for Pyglet. This fixes a few bugs which were found since the last release. I'd recommend that all users upgrade. You can find the new version here. As usual, I'd appreciate any bug reports. If you find anything during Pyweek, please let me know, and I'll do my best to fix things. Just send all reports, along with relevant SVG files to martin@supereffective.org.