Version 0.7.21

I've brought all versions of the game (PC, Mac, Linux, HTML5) up to speed with the fixes over the last year or so. Highlights from this past year include:

• Support for private pools
• New race map: Lapiz Lanes (forked path)
• Can duplicate ganglia by dragging their icon onto the "new ganglia" button
• "Flex" neuron where you can set most all its properties yourself.

And the most recent bugfixes/additions:

• Can do single-creature races.
• Secret key combo to make axons from any neuron (teacher request to get APs on cells like motor neurons)
• Bugfix for accessing private pools that were empty.
• I think I FINALLY figured out why the game would slow down after editing a creature for a while; here's hoping.