Crate thud

Structs

Board	Represents the positioning of the Thud Pieces on the board
Coord	Checked container for a coordinate to address into a Board
Thud	Stores the current state of a game of Thud

Enums

Direction	Represents a cardinal direction on a Board
Piece	Represents a piece on the Thud board
Player	Represents one of the two Thud players
ThudError	Reports invalid action