added new project for party mode challenge

VocaluxeLib/Menu/CMenuParty.cs

@@ -2,12 +2,17 @@
 using System.Collections.Generic;
 using System.Text;
 
+using Vocaluxe.PartyModes;
+
 namespace Vocaluxe.Menu
 {
     public abstract class CMenuParty : CMenu
     {
+        protected IPartyMode _PartyMode;
+
         public CMenuParty()
         {
+            _PartyMode = new CPartyModeNone();
         }
 
         public void SetPartyModeID(int PartyModeID)
@@ -20,6 +25,11 @@ namespace Vocaluxe.Menu
             return _PartyModeID;
         }
 
+        public void AssignPartyMode(IPartyMode PartyMode)
+        {
+            _PartyMode = PartyMode;
+        }
+
         /*
         public sealed override void LoadTheme()
         {

VocaluxeLib/Menu/IMenu.cs

@@ -6,6 +6,7 @@ using System.Windows.Forms;
 
 using Vocaluxe.Menu.SingNotes;
 using Vocaluxe.Menu.SongMenu;
+using Vocaluxe.PartyModes;
 
 namespace Vocaluxe.Menu
 {
@@ -47,6 +48,8 @@ namespace Vocaluxe.Menu
     {
         void SetPartyModeID(int PartyModeID);
         int GetPartyModeID();
+
+        void AssignPartyMode(IPartyMode PartyMode);
     }
 
     public interface IConfig