Spherical collisions and other tweaks

- motes and arena detect true spherical collisions
- Debug lines: AABB collisions draw red, Spherical draw blue
- increased buffer lines to 25000 to accommodate
- new shortcut key 'd' toggles all debug lines.  revealed annoyance in
that if you add lines that frame you HAVE to draw them, but the code to
do these tasks is separate. need more robust solution. Maybe a
isRendering flag in the bufferLines. if false, no lines are added to
buffer.
- left default view mode looking like a neural network