Eubos v3.0

This is a major release because I changed the primary search algorithm to NegaScout from NegaMax.
I also made an ammendment to the hash allocation, so that Eubos now uses the full hash allowance, rather than using the next lowest power of 2 to the maximum hash table size, as it did previously.
These two changes have improved the strength of Eubos, particularly at longer time controls.