-Added king safety calculation based on KING_SAFETY_TABLE, and counting difference of friendly and enemy pieces on squares near to king.
Added function to populate table with squares near to king for all possible king possition and colors (in heuristic.cpp at the moment, but can be moved to file with other lookup tables in the future)
-Added king safety calculation based on KING_SAFETY_TABLE, and counting difference of friendly and enemy pieces on squares near to king.