Changelog:
* [CLOUD ONLY] Satisfaction module: send a third party survey after resolving tickets
* Ocean Blue is now the default Hesk style. For other styles, visit Hesk Styles
* dropped support for PHP 5.3 and 5.4, Hesk now requires PHP 5.5+
* categories can auto-assign tickets to specific users
* categories can have a default due date set
* added support for multi-factor authentication
* improved display options for date and time
* improved attachments process (async upload, drag and...