Image_VideoRecorder - added new class for video recording using FFmpeg framework.
Draw Harness command vanimation has been extended with new options for video recording.
New optional dependency has been introduced - CSF_FFmpeg.
Description of building OCCT with WOK and automake scripts is removed from documentation.
Use of genproj utility is described in pages on building with MSVC, Code::Blocks, and XCode projects.
New script genconf allows starting configuration GUI explicitly; dialog is slightly revised.
Script genproj.sh is renamed to genproj; permissions for scripts are corrected for Linux.
Script env.bat does not set anymore environment required for Products.
