S3 Media Maestro 4.3.0

* Fix: Updated namespacing for Guzzel to prevent conflicting Guzzel packages

* Tweak: Updated the updater class to make API call to license server more efficient
* New: Added slower speeds to player
* New: Added Chromecast button to player

* Fix: Fixed transcoding issue where default role/policy wasn't created with rook access keys
* Fix: Fixed issue where non-video files were attempting to be transcoded
* Fix: Fixed issue where audio shortcode was including video quality parameter
* Fix: Fixed guzzle conflict with multiple plugins