Update style for homepage
Thumbnails support different sizes
Allow embed thumbnails on other websites

Domain names of the websites need to be specified as valid referer.
Invalid referer will get 403 forbidden.
Easy to select embed code
Support embed iframe for folder
Update font-size stylesheet
Add fullscreen display for images
Remove referer restriction
Provide embed code for folders
Update foot message
Update embed iframe
Tweak embed iframe style
Embed iframe tweak
Tweak foot style
Bug fix

Invalid folder id in embed code for iframe
Remove version number for thumbnail
Change iframe script to frame.php
Support exif information

Display exif information when available. Show a map when geolocation
information is available.
Update README.md
Update fullscreen view

Remember fullscreen settings in session instead of cookie. Add utils
directory.