Simple Cellular Automaton Forth for PDP

 PDP is an extension library for Pd that allows you to manipulate movies
 and live video data in realtime. PDP stands for Pd Packet, the data
 container that is used for images in PDP.
 .
 This is a PDP extension lib that contains modules for cellular
 automata built on a (very) minimal forth-like virtual system
 (scaf - simple cellular automaton forth) to define update rules.
 A compiler is included to produce 'scafo' object code that can be
 dynamically loaded into the [pdp_ca] module. So it is possible to
 add/change rules without restarting Pd.