A SandboxController is now pushed on the StackViewController and sets the
KDIonContext::sharedContext before drawing, sets a white background and handles
user input after the Python computation to dismiss the drawing screen.
Change-Id: I51b0474365a85e845227379a16d090541fa8ded7
A script can now be imported in the console.
Moved all the MicroPython functions to python/port files.
Change-Id: I0a23e8cb20005719b800e81470e1c574c702c3b7