* Removed unnecessary passing of $this by reference
Fix for when update failed
Small bug fix
Make sure plugins_url() is used around all file links so the potentially hooked in filters will work
* Fix for upgrade routine not running on (re-)activation of the plugin

* Improved charset support for settings page
* Fully leverage the Options API

* Upped the minimum WP level to fully take advantage of new functions and APIs

*** There is a bug somewhere here when used as must-use! Needs fixing
Yet some more changes for the 3.2 version:

* Small CSS fix
* Small validation improvements
* Additional best practices
* Updated language files