[PATCH] mosaic improvement: user-defined offsets for substreams by Thomas Parmelan. +fixes for svn trunk

RTSP rewind and fastforward support (Scale option). Almost entirely rewritten a patch from K. Staring <Qdk _at_ quickdekay dot net>.

* This is untested, but shouldn't have any adverse effect at least
* Any feedback much welcomed

Patch from Ilkka Ollakka with cosmetic fixes.

  NAL and FU-A modes of RFC 3984
  works for VLC -> VLC
  Does not work with QT yet, because QT requires the optional params profile-level-id and sprop-parameter-sets. these are usually provided in QT hinted tracks I guess. I'm not sure if we can reconstruct them manually. If someone would care to investigate..

* Patch from Basil Achermann to handle esc and space keyboard events in VLCControl when the controller is active
* It seems that corrects a bug when the controller was the acrtive window in fullscreen (that shouldn't happen, but well...)
* Best thing to do would be to handle the keypresses from the vout here too, I guess...

The new format is disabled by default,
so we have little risks of regression.

 - added him to THANKS as well.