Update class description

Author: na2axl

src/LightQL/Entities/Column.php

@@ -32,6 +32,17 @@
 
 namespace ElementaryFramework\LightQL\Entities;
 
+/**
+ * Column
+ *
+ * Describe a database column.
+ *
+ * @abstract
+ * @category Library
+ * @package  LightQL
+ * @author   Nana Axel <ax.lnana@outlook.com>
+ * @link     http://lightql.na2axl.tk/docs/api/LightQL/Entities/Column
+ */
 class Column
 {
     private $_name;