Add PList::Array iterator member functions

... returning both iterators and const_iterators:
* PList::Array::Begin()
* PList::Array::End()

include/plist/Array.h

@@ -39,7 +39,14 @@ public :
 
     Node* Clone() const;
 
+    typedef std::vector<Node*>::iterator iterator;
+    typedef std::vector<Node*>::const_iterator const_iterator;
+
     Node* operator[](unsigned int index);
+    iterator Begin();
+    iterator End();
+    const_iterator Begin() const;
+    const_iterator End() const;
     void Append(Node* node);
     void Insert(Node* node, unsigned int pos);
     void Remove(Node* node);

src/Array.cpp

@@ -88,6 +88,26 @@ Node* Array::operator[](unsigned int array_index)
     return _array.at(array_index);
 }
 
+Array::iterator Array::Begin()
+{
+    return _array.begin();
+}
+
+Array::iterator Array::End()
+{
+    return _array.end();
+}
+
+Array::const_iterator Array::Begin() const
+{
+    return _array.begin();
+}
+
+Array::const_iterator Array::End() const
+{
+    return _array.end();
+}
+
 void Array::Append(Node* node)
 {
     if (node)