ClueByFour / CluePaddle

This branch adds two new C# AIs, both built of course using the ClueSharp base. ClueByFour is a reasonable player which makes useful suggestions, and processes the cards it is shown in disproofs. It can easily beat the stupid AIs ClueStick and ClueBat. It is a good AI to build on to try out more intelligent strategies. CluePaddle does use ClueByFour as a starting point and does some slightly more sophisticated inference to be able to usually beat ClueByFour.

All the files for my C# code are below the ClueSharp dir in the top level. If anyone else wants to write a C# AI using my boilerplate, the easiest way is probably to add a ConsoleApplication project to the solution, imitating what is done in ClueStick or one of the others.