Version 3.2.1

* [Bug fix] Prevent double adding of styles if/when the main function is called several times
* [Speed] Lower Curl connect time-out, so page loading will be faster if no connection can be made to retrieve the file size of a file.
* Added note about filter extension requirement to this readme file.
* Updated links to WP repo
* Upped the 'tested up to' version nr
* Minor code tweaks