Beginning serial monitor.

https://trello.com/c/w0dtCBVH
Adding commandline argument for serialport.
Command shold be serial-monitor.
Adding the beginnings of the IMU visualization.

With OpenGL we can somewhat easily draw 3D objects and move them around.
We'll be making a box to represent the IMU for the quadcopter. Currently
I have the box rotating on all 3 axises.
IMU visualization's graphics engine moved to gem.

Named Gel.
Adding special key and loop support.
Even better IMU representation. A CLASS!
Remove color from boxes, and add normals.
Adding lighting, and reset rotation.
Test IMU Gyro data

https://trello.com/c/MBalIj7P
Beginning work on:
Use Actual IMU Data in OpenGL IMU Visualization
README update.