add main entry point

main.go

@@ -0,0 +1,20 @@
+package main
+
+import (
+	"flag"
+	"fmt"
+	"math/rand"
+	"time"
+)
+
+func main() {
+	numPlayers := flag.Int("Players", 4, "Number of CPU players")
+	seed := flag.Int64("Seed", time.Now().UnixNano(), "Random game seed")
+	flag.Parse()
+
+	entropy := rand.New(rand.NewSource(*seed))
+
+	fmt.Printf("Random seed: %d\n", *seed)
+
+	PlayGame(*numPlayers, entropy)
+}