add filter handling and shot detection

Add `is_async` and `no_async` mode to config handling.

version 0.1463347060: multiple depends; YAML-based handling for h264 and h265 options; some new codec options (for h264); permanent `yadif=1:-1:0` video filter

stable version with `depends` feature (see CHANGELOG)

stable version with `depends` feature (see CHANGELOG)

stable version from 2016.05.09 04:02:08