0.3 Release

0.3 released.

In this release, I was planning to do rotate, translate, scale, and other features that relates to transformation of 3D stuffs. Unfortunately, I can't follow what the original Processing did for implementing these features. But at least, I found out they all rely on a PMatrix3D/PMatrix2D class to centralize codes (I guess). This PMatrix3D class is missing in Processing.js. Therefore, I decided to make PMatrix3D ready before moving forward to utilizing the class.

PMatrix3D is not listed as a feature in Processing/Processing.js reference. Therefore, I read through the original Processing's PMatrix3D class and ports the class to Processing.js

Here's the updated commit. And here's the code itself.