MpaDecFilter: fixed channel layouts for some HDMV LPCM.
update icl13.diff
Updated French translation.
MediaFormats: Add association flag to allow file types to be added without associating them.
MediaFormats: Add non-associable rar filetype.
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
update Changelog.txt, thirdparty/versions.txt and release date.
Update Greek translation.

refs PR 76
MP4Splitter: fixed playback for same 3gp with AMR sound (fixed 4496) (ticket #3079)
Audio Switcher: Improve normalization algorithm.

Use a much better regain strategy (similar to ffdshow's) and fix the regain rate to be linear rather than completely exponential.

This commit fixes #1936.
Audio switcher: Use percentage instead of dB for the boost.

Internally a percentage was already used and it is much easier for the user to understand a boost expressed in percentage.
Audio Switcher: Add a setting to change the max normalization factor.

Use a max normalization factor of 4 by default instead of 10 to avoid huge volume variations.

Refs: #1936.
Bump version to 1.6.8.