New server framework, an example, and compressed packet fixed.

server/gameplay.go

@@ -0,0 +1,10 @@
+package server
+
+import (
+	"github.com/Tnze/go-mc/net"
+	"github.com/google/uuid"
+)
+
+type GamePlay interface {
+	AcceptPlayer(name string, id uuid.UUID, protocol int32, conn *net.Conn)
+}