AviSplitter: cosmetics and optimization.
AviSplitter: fix warnings.
VSFilter: move the version to a separate file.
AboutDlg.cpp: use the MPC_VERSION_ARCH define
Using a precommit script seems like speaking Chinese for some.
setup WIP
Simplify preprocessor config.
fix typo in comment
MediaInfo: use the ParseSpeed option to speed up things.

Downsides: GOP size may be missing, caption detection can fail.
Remove unneeded extern keyword.
cosmetics: French to English in comment.