New version check removed

Author does not update its software anymore.
Version 0.3.7

* Version number now starts at 0.3.7
* Added thumbnail cache.
* Added optional folder comment and image title/caption
* darkgold2 theme from version 0.2.3 adapted to this version.
* darkgold2 is now the default theme.
* Increased thumbnail size.
* Increased number of images per page.
* Page is now in UTF-8 by default to support international characters.
* Removed many warnings.
* Corrected XSS vulnerability.
* Added htaccess to prevent raw browsing of images folder.
* Removed version check against original author's website.