clean and comments for category templates and php files

src/lib/Output.php

@@ -91,4 +91,16 @@ class Output
     }
     return true;
 	}
+
+  public function AllDatesByEquipment($eqmt_id)
+	{
+    $output_dates = DB::getInstance()->get(
+      'SELECT DISTINCT output_date FROM plugin_materiels_output WHERE equipment_id = ? ORDER BY output_date DESC;', $eqmt_id);
+    $output_dates_array = array();
+    foreach ($output_dates as $row)
+    {
+      array_push($output_dates_array, $row->output_date);
+    }
+    return $output_dates_array;
+	}
 }