chess layout adjustments

Chess has now been layed out a bit better to maximize space usage, and put items in proper locations:

1. captured pieces are bottom right, and minimized since it is not often referred to
2. PGN is top right, but is not as high. To compensate, there is a scrolling bar, and the list is scrolled to the bottom automatically to show the last move.
3. messages are moved to be more visible, and is available with a scroll bar as well.
4. the chess board is smaller to let others have more room.

As you can see, things are squeezed more together, but is still a bit big for our normal page layout. Stay tuned for more adjustments as we play with improving the site!