Added a basic UI for reading the serial data and plotting it onto graphs.

In order to get this UI working you need to have installed python 2.x,
PySide, numpy, scipy, pyqtgraph.The UI reads from the serial port and is
expecting values like:

ACC: 0.06 0.02 1.00
GYR: 8 -3 -3
MAG: -298 -238 -583
ALT: 96.36

Currently I’m only plotting  the last 200 values read in for each plot.
So the plot for each sensor is rolling.