Captured Piece Panel added

The pieces that have been captured are now displayed with new half-sized images of the pieces, sorted by value.  This is where the analysis panel used to be, since it is more relevant for a user than all the branches that the computer considered.
Adjusted positional score weight and material score weight. The engine seems to drop material pretty often when the positional weight is 25% of it's consideration. Lots of tweaking to be done here.