Create grade/report/visual plug-in

Create a gradebook report plugin (grade/report/visual) for displaying charts and graphs using flare as part of the GSoC animated grade statistics report project.

Includes:

• Making adapters to interface with flare.
• Making the visualizations using flare.
• Adding options to control viewing of stats by roll in class.
• Adding customization options.

Flare: http://flare.prefuse.org/