package/python-can: new package

This patch provides controller area network support for Python.

Signed-off-by: Angelo Compagnucci <angelo.compagnucci@gmail.com>
Acked-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
Tested-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>