Finished the Graph

Finally done.

I've also built-in an exporter for CSV data (and soon GNUplot data). You can hit the 'export' key whenever you see interesting phenomena pop-up on the graph, and then have it re-drawn it in one of these external programmes for a cleaner (for publishing) or more detailed view.

There are a couple of things that I might improve later:

I can't rotate the text to put my label for the y-axis sideways, so I'm just not using at the moment. What I might consider is this additional MoveableText system. I could use my existing identity matrix transformation (that I used to align the line plots with the screen) to put the moveable text into place.

The points should be automatically culled once there are more than a certain threshold being stored in the line plot, or if they fall off the graph - I'll do this...eventually but it's not a high priority.