- More work done on Update, Insert and Delete clause

- Added TOP property to select and delete to fit MSSQL limit's term.
- Added a new interface allowing object's manipulation on save() and load() queries

src/Entity/Field/Datetime.php

@@ -2,11 +2,30 @@
 
 namespace Ulmus\Entity\Field;
 
-class Datetime extends \DateTime {
+use Ulmus\Entity\EntityObjectInterface;
+
+class Datetime extends \DateTime implements EntityObjectInterface {
+        
+    public function load(...$arguments) 
+    {
+        $value = $arguments[0];
+        
+        # From Timestamp
+        if ( is_numeric($value) ) {
+            return new static("@$value");
+        }
+
+        return new static($value);
+    }
+    
+    public function save() 
+    {
+        return $this->getTimestamp();
+    }
     
     public function __toString()
     {
         return $this->format("Y-m-d H:i:s");
     }
     
-}
+}