AI bug

The AI does not make its move based on material position scoring.  It just makes first move in array.
This error can be reproduced with the following move sequence:
e4  h5
Nc3 h4
Qh5 ?h3?

The analysis looks one full move ahead, so it should see Rxh5 and rank this move over h3.

I have a fix if I can figure out how to do a pull request.
