Download Monitor - Amazon S3 4.1.0

* Fixed: Amazon bucket browsing for file error in DLM 4.5.99 and below

* Fixed: JS Adding file directly from Bucket list on new Downloads

* Fixed: DLM 4.6.0 compatibility
* Changed: Notices priority set to 8.
* Fixed: Fix for PHP 5.6 error "unexpected '::' (T_PAAMAYIM_NEKUDOTAYIM)".
* Changed: Added target _blank attribute to documentation pages.
* Changed: Added required PHP version to 7.1