[Other] A little test tourney

I ran a small tourney (300 games) to test the internal iterative deepening added in the latest version. The results were:

   Engine  Score         1         2         3
1: v0.241b 122,0/200     *     52.0-48.0 70.0-30.0
2: v0.24b  114,5/200 48.0-52.0     *     66.5-33.5
3: v0.232b  63,5/200 30.0-70.0 33.5-66.5     *

As you can see the 0.24 version with its adjusted evaluation is plenty stronger than the 0.23 version. However there is not much difference between the version with iid and the one without (the result between them 52-48).

I will keep working on this and see if we can get it to do better.