**Version 0.25.2**
Some changes with the cache clear method
Remove cache func when get option, that's really not necessary
**Version 0.25.1**
Fix the mkdir bug under PHP4
**Version 0.25**
Add group feature to the cache class
Add 'current category' to the 'vary by' options
Move the cache folder to 'wp-content'
**Version 0.22.1**
Some fixes on the cache class
**Version 0.22**
Add some links for deleting widget cache files
**Version 0.21**
Lock cache files when update
Add user agent to vary by options
**Version 0.2**
Add settings page
Add vary by options (Enable in the setting page first)
e.g. Some widgets output different content to different visitors, like Administrator/Subscriber/Editor/Author, for more information, read this
**Version 0.15.1**
Bug fixed: options not properly saved for multiple sidebars, thanks to Lordgoth
**Version 0.15**
Add auto expire options
e.g. for recent comments widget, the cache should auto expired when someone add comments.
**Version 0.1**
Initial release
