Fix MarkupFixer, del files, mod headers

src/UniqueSluggifier.php

@@ -4,10 +4,11 @@
  * PHP TableOfContents Library
  *
  * @license http://opensource.org/licenses/MIT
- * @link https://github.com/caseyamcl/toc
+ * @link https://github.com/igorvbelousov/toc
  * @version 1.0
- * @package caseyamcl/toc
+ * @package igorvbelousov/toc
  * @author Casey McLaughlin <caseyamcl@gmail.com>
+ * @author Igor V Belousov <igor@belousovv.ru>
  *
  * For the full copyright and license information, please view the LICENSE
  * file that was distributed with this source code.