Partly revert recent changes removing #imports and #includes, under OpenChange, as they cause more problems than they solve.

OpenChange/MAPIStoreRecurrenceUtils.h

@@ -23,7 +23,11 @@
 #ifndef MAPISTORERECURRENCEUTILS_H
 #define MAPISTORERECURRENCEUTILS_H
 
+#include <talloc.h>
 
+#import <NGCards/iCalCalendar.h>
+#import <NGCards/iCalRecurrenceRule.h>
+#import <NGCards/iCalTimeZone.h>
 
 @class iCalEvent;
 @class iCalRepeatableEntityObject;