PUtil

I saw an item on the todo list ([core/todo.txt:190](https://github.com/processing/processing/blob/master/core/todo.txt#L190)) to move non-draw functions out of PApplet. This is just a start, as more methods (like I/O) could be moved into the PUtil class. Sketches still work as before, because an `import static processing.core.PUtil.*` was added to the PdePreprocessor.

I thought that this could help you.