2002.03.11 ~12  Significance of data structures

After tampering with Scheme, Python, and object-oriented programming
paradigms, I've taken a different view of the data arrangements in my
mod.  I've separated out "templated" information from "instantiated"
data, otherwise known in C++ parlance as "classes" and "objects".

The data type gentity_t describes the base properties of all objects
(entities) in the game.  Player-specific data go with gclient_t, to
reduce space waste.  There are 1024 entities, of which the first 64
are the clients (players, bots).

I extended gentity_t and gclient_t with unions of instantiation-specific
structs.  Since an entity can only be of one "type" at a time, a union
is quite suitable -- only one of the extended structs makes sense at
any time.

The CVS repository of FI has been updated with this revised view of data.