[Bug-gnubg] move fitlers (again again)

[Joern Thyssen]

Hi,

As some of you might have seen alerady, I've checked in code that allows
you to setup move fitlers in the GUI. Also, I've introduced seperate
movefilters for evalution, analysis, rollout, and player gnu.

I guess there are still some glitches, let me know if you find any!


It's also possible to select among a few pre-defined move filters. The
"narrow" is equal to the default one (BTW, the 3-ply filter looks
fishy!?). For the "normal" and "klarge" one I've just inserted some
random values. If you have any suggestions for these please let me know.

Jørn