remove location-based attack map class
debug bitboard piece movement masks
debug bitboard masks
experiment with native extension for bitboard operations
fix initial bitwise operations
tediously move all BB setup code from Ruby to C...
reorganize native extension
remove previous organizational scheme
fix linker issue with headers
Merge branch 'master' into piece_centric
finish initial Board extension
update header structure and test PiecewiseBoard extension
Delete bitboard.bundle
Delete ruby_chess.h
Delete ruby_chess.c
connect move_gen.c to Ruby Piece subclasses
Merge branch 'piece_centric' of github.com:stephenjlovell/chess into piece_centric
finish PiecewiseBoard C implementation and testing
update Ruby interface to PiecewiseBoard
finish move_gen.c implementation