Myrddin 0.92 release

[JVMerlino]

Myrddin v0.92 has been released. Version 0.92 plays approximately 3060 ELO (CCRL) at 1 CPU. This is an improvement of approximately 70 points compared to version 0.91.

Change List:
-- Now doing incremental updates to the NN accumulator during make/unmake move
-- Now compiling with clang (within MSVC IDE)
-- Restored David Carteau's recommended eval multiplier - scores will be about 2x higher than before
-- Now clearing Killer move scores with every depth
-- Fixed potential instability/crash due to the move stack possibly becoming greater than MAX_DEPTH
-- Minor optimizations to PVS implementation and cutoff ordering

https://github.com/JVMerlino/Myrddin/re ... Myrddin092

As always, many thanks to the community, particularly those who have helped with Myrddin's development, and put up with all my complaining....

jm