Get standalone processing.py working again

This was actually fairly simple - just chasing down a few null pointers and telling ant that there isn't a video library in p5 core anymore.

I haven't played with it extensively but tests pass.
Just FYI, I don't know if/when you last used the standalone, but it was working brilliantly for me on Win7 x64, Processing 2.1.x, Java 7 (I'd have to check on the Java version) - so i.e. right before jdf launched the mode.