Changes made to CPL  from the description given in the
technical-report 630.

1) After executing a divide "one of the daughter cells" continues to
execute the instructions in the state. The other daughter cell does
not execute until the next time step.

Known bugs
---------

1) Minor variations are observed in cell's area when they are
divided or grown.

2) Difficult to grow cells when they start with unit area. To be
precise you cannot grow a cell if all its neighbors have unit area. 

Bugs Fixed
----------

June 19, 1993

1. Calls to irint removed.
2. cpp -B changed to cpp. Since -B is not supported by the cpp from
GNU 2.3.3.
