[add] Added LobbyWorld.

src/sj/ProgramSet.d

@@ -0,0 +1,24 @@
+/// License: MIT
+module sj.ProgramSet;
+
+static import sjplayer = sjplayer.ProgramSet;
+
+///
+class ProgramSet {
+ public:
+  ///
+  this() {
+    for_players_ = new sjplayer.ProgramSet;
+  }
+  ~this() {
+    for_players_.destroy();
+  }
+
+  ///
+  @property sjplayer.ProgramSet forPlayers() {
+    return for_players_;
+  }
+
+ private:
+  sjplayer.ProgramSet for_players_;
+}