Support subtitles

[darkdragon-001]

I would really like to see Avidemux supporting subtitles.

I usually just want to merge/cut video files. All operations should be performed on subtitles as well and then saved in the resulting file.

[bernd_b]

You are not alone:
http://avidemux.org/smif/index.php/topic,17402.msg78874.html#msg78874
http://avidemux.org/smif/index.php/topic,16996.msg76181.html#msg76181

but so far:

http://avidemux.org/smif/index.php/topic,16996.msg76193.html#msg76193