Readme.md: proper table HTML markup.
CONTRIBUTING.md: Fix typo.
Fix the Changelog.

Pushed last commit way too quickly to be on time for the nightly...
Fix the installer after 3545df49b654a3fa434b3a1dd7c4be324b09e85f.

Completely forgot to actually add the non-custom messages part...
PPageOutput: Fix VMR-9 settings
ShockwaveGraph: stop movie in graph creation

Otherwise the graph reports that it's running right after creation,
MainFrm doesn't expect that
ShockwaveGraph: handle state transition properly