day 21a complete

transferred the game structs to the shared area, linked list can be manipulated to have a different board type and so placing in shared reduces code size

shared/LinkedListGameBoard.go

@@ -0,0 +1,16 @@
+package shared
+
+type GameBoard struct {
+	Start *GamePosition
+}
+
+type GamePosition struct {
+	Position int
+	Next     *GamePosition
+}
+
+type Player struct {
+	PlayerNum int
+	Score     int
+	Position  *GamePosition
+}