Update Stockfish Options

[llimllib]

• Stockfish has changed their options. They are documented at http://support.stockfishchess.org/kb/advanced-topics/engine-parameters
• You can see the option source code at https://github.com/official-stockfish/Stockfish/blob/master/src/ucioption.cpp#L55
• Since they are in flux, we should probably not bail out every time we encounter an inability to set an option; this code prints and error rather than throwing a ValueError upon finding an option that it cannot set
• The current stable version of stockfish has a Contempt Factor option but the current development version has renamed it to Contempt. This patch just attempts each name on the assumption that one of them will succeed
• The rand option is greatly simplified by the fact that there now appears to be only one option that can reasonably be altered to slightly change the engines behavior, the Contempt parameter

Closes #3