Log Message:
Update to 0.4.1, provided by Aleksey Cheusov in private email.

Changes since 0.4:
    vdpau.h: Clarify video mixer field amount recommendation

    More doc issues pointed out by Xine authors.

      * Fix Doxygen warning; it gets confused by quotes.
      * Add subsection names, so part of the title doesn't get swallowed as the
        subsection name.
      * Document data required from MPEG-4 Part 2 & DivX bitstream.

    vpdau.h: Fix typo and clarify wording.