-Changes for 11-14-2005, 0.10
Added performance enhancements for energy-position graph
Added a vertical location indicator in energy-position graph
Bugfix: A bounce entails a loss of energy (which I didn't intend).
Add coefficient of restitution.

-Changes for 11-8-2005, 0.09
Improved performance on energy vs. position plot.
Data points fade on the energy vs. position plot.
Gravity is user-settable.
Better center of mass for the skater.

-Changes for 11-7-2005, 0.08
1. Fixed a bug in the friction update
2. Switched to Runge-Kutta 4th order differential equation solver.
3. Max selectable coeff of kinetic friction is 0.04
4. Added plot of energy vs position (experimental, not optimized).
5. Move labels below bar chart.
6. Colorize bar chart labels.
7. Added thermal energy to plot
8. Fixed a bug that prevented the splash screen on startup.
9. Minimized download size.

-Changes for 0.07 and earlier
Record history dots
Measuring tape
Man can be re-centered without restarting application.
pie chart Area is proportional to energy (not Diameter)