removed require 'cell' from board.rb
refactored grid_ref_array method, tidied up tests a bit
minor board test refactoring
basic display shows water
add coordinate display
Added More Information To README, Added Consistency In Markdown Format
Merge branch 'development' of github.com:mishal1/Battleship into edit_README
Merge branch 'development' of github.com:mishal1/Battleship into development
Board can place single cell of ship
Merge branch 'development' into player
Merge branch 'development' into player