Python wrapper for RPi added
Merge pull request #35 from mz-fuzzy/master

Python wrapper for RPi added

This wrapper and the pingpair_dyn example seems to have brought up a bit of a timing issue that should be fixed in the latest commit https://github.com/TMRh20/RF24/commit/d41d47ab20cb794b8250560154076b1b2b06feae  
Also, (minor issue) it seems to be missing the define for ```BCM2835_SPI_CS0``` and ```BCM2835_SPI_CS1``` 
That can be fixed, and it seems to work nicely otherwise, so merging.