RenderersSettings: Turn VSync on by default if the user is not using Vista or later.

See #3049.
run astyle
Improve contrib/sign.bat.

Check if Visual Studio is installed.
Changelog.txt: fix typo
mpcresources/rcfile.pl: fix typo in comment.
contrib/sign.bat: revert the ENDLOCAL change after 36538f833f990e43f3a0e7758de1bb74c04056cd
Make "Sharpen Complex 2" shader compatible with Pixel Shader 2.0.

This commit fixes #3008.
MediaFormats: RAR was incorrectly flagged as audio-only.

Fixes #3088
OpenFileDlg: Prevent the extension list from being added to the file types on Windows 7.

This makes the file types dropdown box consistent with XP, Vista and 8.