fixed party mode xml reading, added compiler code, added challenge game mode files (just a first test)

Output/PartyModes/Challenge/Code/CPartyModeChallenge.cs

@@ -0,0 +1,36 @@
+using System;
+using System.Collections.Generic;
+using System.Text;
+
+namespace Vocaluxe.PartyModes
+{
+    public class CPartyModeChallenge : CPartyMode
+    {
+        public CPartyModeChallenge()
+        {
+            _ScreenSongOptions.Selection.RandomOnly = false;
+            _ScreenSongOptions.Selection.PartyMode = false;
+            _ScreenSongOptions.Selection.CategoryChangeAllowed = true;
+            _ScreenSongOptions.Selection.NumJokers = null;
+
+            _ScreenSongOptions.Sorting.SearchString = String.Empty;
+            _ScreenSongOptions.Sorting.SearchStringVisible = false;
+        }
+
+        public override ScreenSongOptions GetScreenSongOptions()
+        {
+            _ScreenSongOptions.Sorting.SongSorting = _Base.Config.GetSongSorting();
+            _ScreenSongOptions.Sorting.Tabs = _Base.Config.GetTabs();
+            _ScreenSongOptions.Sorting.IgnoreArticles = _Base.Config.GetIgnoreArticles();
+
+            return _ScreenSongOptions;
+        }
+
+        public override void SetSearchString(string SearchString, bool Visible)
+        {
+            _ScreenSongOptions.Sorting.SearchString = SearchString;
+            _ScreenSongOptions.Sorting.SearchStringVisible = Visible;
+        }
+
+    }
+}