processing.js private and public finally working, I think

I think I have finally finished processing.js ticket #133.

A simple test to see it.

And a cool example that uses public variables. This particular test program was giving me the most difficulties while I was coding. It seemed whenever I would run the automated tests, this one would always have a new problem, and it also happens to be a long test, so it's harder to debug, so to be able to edit it and change the example is satisfying.

I just need to write some clear, simple, and thorough test cases for private and public use, and I'll be done.