Provide additional formats for the FFmpeg/LibAV decoder.

git-svn-id: svn://daper.net/moc/trunk@2599 910807d9-36e0-0310-a014-e9ea483e2ba4
Provide workarounds for possibly broken FFmpeg/LibAV seeking.

These workarounds were originally developed some time ago to
avoid identified problems with seeking in FFmpeg/LibAV.  However,
recent testing has not been able to reproduce those original
problems so the workarounds are being provided but disabled so
they can be turned on if those problems are reported again against
specific FFmpeg/LibAV versions.

git-svn-id: svn://daper.net/moc/trunk@2600 910807d9-36e0-0310-a014-e9ea483e2ba4
Update miscellaneous documentation.

git-svn-id: svn://daper.net/moc/trunk@2601 910807d9-36e0-0310-a014-e9ea483e2ba4
Miscellaneous non-functional changes (spelling, etc).

git-svn-id: svn://daper.net/moc/trunk@2602 910807d9-36e0-0310-a014-e9ea483e2ba4