Use bool(Bitboard b) instead of !!b (#1321)
[stockfish] / AUTHORS
2016-11-06 ppigazziniUpdate AUTHORS for SF8
2016-01-02 ppigazziniUpdate AUTHORS and copyright notice
2014-06-23 Gary LinscottMerge pull request #5 from glinscott/authors
2014-06-21 Gary LinscottRemove some duplicates
2014-06-21 Gary LinscottAdd AUTHORS