peterlane/chess_data: Library for searching/filtering datasets of chess games based on combinations of pieces.

Peter Lane a1e78ee69e Improved recognition of PGN format		4 lat temu
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board.rb	a1e78ee69e Improved recognition of PGN format	4 lat temu
database.rb	a1e78ee69e Improved recognition of PGN format	4 lat temu
game.rb	a1e78ee69e Improved recognition of PGN format	4 lat temu
moves.rb	220aa7c17b Added error checking on games	4 lat temu
position-definition.rb	a1e78ee69e Improved recognition of PGN format	4 lat temu