Add support for "function" decorator in win32/win64.

This can be used on global directives (e.g. global _foo:function) to
indicate the global is a function.  This is useful for incremental
linking in MSVC.
Make the detection of Python in the Visual Studio 2010 build more robust
Fix vpbroadcastq.

Patch by: Jason Garrett-Glaser <jason@x264.com>
Unbreak distcheck.
cv8: Fix line number issues with multiple files.

Patch by: Knut St. Osmundsen

[#263 state:resolved]
Update config.guess and config.sub.

[#255 state:resolved]
Optimize matching loops.

Reported by: Po-Chun Chang

[#264 state:resolved]
[#265 state:resolved]
[#266 state:resolved]
Minor change to Python detection in the Visual Studio build to avoid spurious error message
test commit