Allow user to choose which weekdays to display

Closes #1841

UI/Scheduler/UIxCalMonthView.h

@@ -1,6 +1,6 @@
 /* UIxCalMonthView.h - this file is part of SOGo
  *
- * Copyright (C) 2006-2015 Inverse inc.
+ * Copyright (C) 2006-2016 Inverse inc.
  *
  * This file is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -44,6 +44,8 @@
 
   NSArray *dayNames;
   NSArray *monthNames;
+
+  unsigned int *daysNumbersToDisplay;
 }
 
 - (NSDictionary *) monthBeforePrevMonthQueryParameters;