Moved drawing of borders to Visualizer base class

Increase default strokeWeight to 2 (was 1)
Removed OpenGL settings from all but VisualizerPS
Break out drawWelcome() from draw()
Set background and colorMode in Visualizer.draw
Use overloaded drawBorders to set fill, stroke, etc
Removed OpenGL from Navier

(no effect?)
Add legs.
Added 'meter' versions of getters to Position
Add soccer app
Modified scaling of alpha for smoke effect