allowed access to the @board matrix
implemented Pawn class to inherit from Piece
made pieces respond to location
made pieces respond to location
made pieces report location
gave pawns an icon
Added King class
Added Queen class
Added Rook Class
added Biship class
added Knight class
restyled location of constants
added readme
restyled location of constants
edited board initialization to use a hash to store cell data
removed Matrix requirement on board
edited board init to set up all pieces
made pieces able to print their character
added ability to print the chessboard
added A-H to bottom of board