Correzioni al dao (save Tested)

Modifiche ai model
Rimossa la constrained interface in quanto inefficace e troppo pesante

private/lib/constrained/ConstraintException.php

@@ -0,0 +1,32 @@
+<?php
+/*
+Author: 		Riccardo Di Dato
+Creation Date:	07/gen/2016
+*/
+
+class ConstraintException extends CoreException{
+	private $operation;
+	private $key;
+	private $value;
+	
+	public function __construct($operation,$key,$value = null){
+		$this->operation = $operation;
+		$this->key = $key;
+		$this->value = $value;
+		parent::__construct("Impossible to execute operation '$operation' on attribute '$key'".(!is_null($value)?" with value '$value'":""));
+	}
+	
+	public function getRelatedOperation(){
+		return $this->operation;
+	}
+	
+	public function getRelatedKey(){
+		return $this->key;
+	}
+	
+	public function getRelatedValue(){
+		return $this->value;
+	}
+}
+
+?>