added demo for observing changes to a single managed object

HardcoreData/HardcoreData+Observing.swift

@@ -0,0 +1,27 @@
+//
+//  HardcoreData+Observing.swift
+//  HardcoreData
+//
+//  Created by John Rommel Estropia on 2015/05/06.
+//  Copyright (c) 2015 John Rommel Estropia. All rights reserved.
+//
+
+import Foundation
+
+
+// MARK: - HardcoreData
+
+public extension HardcoreData {
+    
+    // MARK: Public
+    
+    public static func observeObject<T: NSManagedObject>(object: T) -> ManagedObjectController<T> {
+        
+        return self.defaultStack.observeObject(object)
+    }
+    
+    public static func observeObjectList<T: NSManagedObject>(from: From<T>, _ groupBy: GroupBy? = nil, _ queryClauses: FetchClause...) -> ManagedObjectListController<T> {
+        
+        return self.defaultStack.observeObjectList(from, groupBy, queryClauses)
+    }
+}