madVR v0.92.5

* added new algorithm "reduce compression artifacts"
* added new algorithm "reduce random noise"
* added file name tag and keyboard shortcut support for new algorithms
* switched to igv's AdaptiveSharpen variant
* custom mode optimization is now available for modes not created with madVR
* fixed: mode optimization didn't work for Nvidia (introduced in v0.92.4)
* fixed: ProgDVB: DXVA deinterlacing didn't activate after channel switch
* fixed: potential freeze when freeing madVR instance
* fixed: playback trouble after switching video files (introduced in v0.92)
* fixed: screenshot memory leak