add pop_back/pop_front/push_back/push_front to array, to make it according to doc, fixes #3040

core/array.cpp

@@ -222,6 +222,24 @@ void Array::invert(){
 }
 
 
+void Array::push_front(const Variant& p_value) {
+
+	_p->array.insert(0,p_value);
+}
+
+void Array::pop_back(){
+
+	if (!_p->array.empty())
+		_p->array.resize( _p->array.size() -1 );
+
+}
+void Array::pop_front(){
+
+	if (!_p->array.empty())
+		_p->array.remove(0);
+
+}
+
 
 Array::Array(const Array& p_from) {