Imb

Hi Marco,

I believe this makes the infamous Quadratic Material Balance Table slightly more readable.

I changed _color_  to _side_ because color may be confusing sometimes. I myself for quite a while in the beginning thought color meant color of square the piece was on (for e.g dark-squared bishop vs light-squared bishop). Perhaps some may not get confused by this, but I think _side_ is just more direct and clear (from an English perspective). There is no confusion as to color of square or color of your pieces. It is always better to be clear. 

_Optional:_
You may even consider a few renames elsewhere in the code based on this.

For example:
````Color Them = (Us == WHITE ? BLACK : WHITE)````
to
````Side Them = (Us == WHITE ? BLACK : WHITE)````