Added wrapping adapter for isHistory to ease binding

MacPass/KPKNode+MPIsHistory.m

@@ -0,0 +1,21 @@
+//
+//  KPKNode+MPIsHistory.m
+//  MacPass
+//
+//  Created by Michael Starke on 25.04.17.
+//  Copyright © 2017 HicknHack Software GmbH. All rights reserved.
+//
+
+#import "KPKNode+MPIsHistory.h"
+
+@implementation KPKNode (MPIsHistory)
+
+
+- (BOOL)isHistory {
+  if(self.asEntry) {
+    return self.asEntry.isHistory;
+  }
+  return NO;
+}
+
+@end