More sophisticated scoring algorithm

[tjguk]

At present the line scoring gives scores for winners or blockers but leaves everything else at zero. If #1 is implemented, we need some more refinement in the non-winning/blocking scores. Ideas:

• Score for each player / opponent counter in place
• Score negative for opponent and positive for player and then score the abs(diff)
• Having scored lines, consider free coords which fall on more than one line