Add stereo RG video saving/loading for lower sized videos (mono stereo only, previous stereo video type is now called stereo concat).
Will attempt to detect stereo video type from filename when loading from File->Load Stereo video by looking for 'srgvid' or 'sctvid'. If this is missing then 'mp4' files are assumed to be stereo RG videos and 'avi' files stereo concat videos.
Remove doxyfile generated files from repository.
Fix appcast release info not loading. Release file (release.md) is now referenced as github raw link on prod branch.