Code to interface the VCNL4000 to the Raspberry Pi

I developed some piece of code to interface the VCNL4000 proximity sensor (https://www.adafruit.com/products/466) to the Raspberry Pi. I used the Arduino example as a reference, and tried to stick as close as possible to the syntax of the rest of the repository.

I think it would be a nice addition to your repo.

Best,
Marc-Olivier Schwartz