Radiolaria subdivision

I have been experimenting with adding subdivision to the radiolaria applet.  It requires a fundamental restructuring of the code to allow for arbitrary and dynamic connections.  Right now the process is one way: you can click to divide a cell, but you cannot undo the operation.  If I make it reversible, we may be adding this functionality to the online application.  Regardless, we will be using this on the new rings and cuffs that we are 3D printing.