Fix in-game detection.

Add cfg file option for MoP, update example config and readme for rel…

…ease 516.

Merge branch 'main' of https://github.com/bolrog/d2dx into main

Add "frameless" window option in cfg file, for hiding the window frame.

Delete old sgd2fr

Update readme for release 511.

Update readme for release 510.

Update readme for release 508.

Update readme for release 507.

Update readme for release 506.