OCaml package documentation

1. ffmpeg 1.2.4
2. ffmpeg-av 1.2.4
3. ffmpeg-avcodec 1.2.4
4. ffmpeg-avdevice 1.2.4
5. ffmpeg-avfilter 1.2.4
6. ffmpeg-avutil 1.2.4
7. ffmpeg-swresample 1.2.4
8. ffmpeg-swscale 1.2.4