[crossfire] Code Doxygenification

[Nicolas Weeger (Laposte)]

Hello.

Having thought some, I suggest we try to have all documentation (including the 
doc/Developers directory) regrouped into Doxygen.

Unless I'm mistaking, we can ask Doxygen to include some information from 
external sources, so it shouldn't be hard to merge eg object types, and such.

Also, stuff like what one fields does exactly (example: sp is used as 
spellpoints, but also as exit coordinate) should be directly in the code I 
think.

Having only one documentation entry point is IMO what we should aim for.



Nicolas