Upgrade to processing 1.4.8.

[kroko]

Fixed relative path in lib/processing.js Upgraded submodule to Processingjs 1.4.8. Added example for how to use this module to compile pde sketch into javascript that can be used in LAMP webapplication. Apparently the change in lib/processing.js breaks your scribbleplotter example, this needs investigation. A quick diff shows that processing structure has changed a lot, i.e., Processing object now under window object.