Small bugfix

Ignore Apple ._* files

Small bugfixes and enhancements

Bugfixed a race condition and added option for GRUVI logo and output buffer flush for faster display of image URL list from gruvi.php.

Support LMS' internal web server

Added support for running directly in LMS' internal web server and choice between serial and parallel conversion of image files.

Multiple image folders support

Added possibility to choose multiple image folders with internal weighting of number of random image selections from each folder.

Original release

As published here: https://forums.slimdevices.com/showthread.php?108498-Announce-GRUVI-generate-random-URLs_for-viewing-image