[FFmpeg-cvslog] Merge branch 'release/0.8' into release/0.7

[Michael Niedermayer]

ffmpeg | branch: release/0.7 | Michael Niedermayer <michaelni at gmx.at> | Mon Apr  9 18:00:29 2012 +0200| [9dd50da65b89406cd4e3adb759a70d185edf51ff] | committer: Michael Niedermayer

Merge branch 'release/0.8' into release/0.7

* release/0.8:
  Changelog, delete, its too inaccurate, git log is better.
  pngenc: Fix incorrect mask used for interlaced mode.
  dsp: fix diff_bytes_mmx() with small width
  Replace SSE2 instruction in scalarproduct_float_sse() by SSE equivalent.
  Update changelog for 0.7.5 release

Merged-by: Michael Niedermayer <michaelni at gmx.at>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=9dd50da65b89406cd4e3adb759a70d185edf51ff
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