Get input bitrate

Remove unconditionally enforcing of "preferred" media type upon the capture devices. Some devices don't handle this properly, which often results in a BSOD. By not setting a preferred media type the problem dissappears. Please check this with other type of devices for any regression.

(like double clicking on a file or disc) use the --one-instance option.

People used to running 10 instances of VLC at once should now be able
to do so. Normal people used to running other media players should now
get the behavior they expect (ie: not open 10 different VLCs when double
clicking on 10 mp3s)

(if only we had a cleaner UPnP stack)

* ctrl_checkbox.cpp: animated bitmaps are now supported in checkbox controls

 into the p_private attribute of the vlc_object(NNNN). Used by embedding
 applications.

several VLC instances at once should be able to disable this option in
the prefs.

Fix compilation

  - fix last bugs with SPDIF stream selection
  - code and debug cleanup
  - added more comments to clearify the code, so it is useful to others :D

* Set FD_RDAHEAD and FD_NOCACHE on when reading from files. improves reading from networkshares and VMEM usage.
  Suggested by Marko Karppinen.

dvdnav.patch: changed code that read DVD title to use dvdread APIs, so that WIN32 and non-unix platforms can also read it
dvdnav.c: add DVD title to meta information