remove version from doc blocs

- @version in file header level isn't used on code docs, it is intended
  for API versions at class or method level
- avoids needing to update all these files on version increment
- avoids needing to regenerate SRI hashes for privatebin.js through
  extra phpunit run
- simplifies VERSION_FILES list
- avoids having to filter above list during loop
- adds a few missing doc bloc headers

lib/Vizhash16x16.php

@@ -3,12 +3,11 @@
  * VizHash_GD
  *
  * Visual Hash implementation in php4+GD,
- * stripped down and modified version for PrivateBin
+ * stripped down from version 0.0.5 beta, modified for PrivateBin
  *
  * @link      https://sebsauvage.net/wiki/doku.php?id=php:vizhash_gd
  * @copyright 2012 Sébastien SAUVAGE (sebsauvage.net)
  * @license   https://www.opensource.org/licenses/zlib-license.php The zlib/libpng License
- * @version   0.0.5 beta PrivateBin 1.7.3
  */
 
 namespace PrivateBin;