[Nel] Snowballs building problem

[Yann Morvan]

That was exactly why I wanted to have a look at Snowballs.
The point I was particularly interested in was the mecanism
used by the server to identify a player's action and call the
matching piece of code, and how to define those "pieces of code".
I've compiled the documentation, so I'll just have to look at it,
but if you can think of informations I may have troubles to find,
don't hesitate to tell me about it.

	Yann