Reduce # of buffers to 16.
Reduce # of buffers to 16.

This gives just shy of 112KB free for Forth's dictionary,
assuming it's built for a 256KB RAM system.

KestrelComputer/kestrel,sam-falvo/kestrel,sam-falvo/kestrel,KestrelComputer/kestrel,sam-falvo/kestrel,sam-falvo/kestrel,KestrelComputer/kestrel,KestrelComputer/kestrel