Improve the naming of subtitles tracks.

Avoid showing an useless and ugly comma when possible.

This commit fixes #1600.
build.bat, mpc-hc_setup.iss : add ICL13 support
Cppcheck fixes (WIP)
rename MPCVideoDec to MPCVideoDecoder
use try catch directly instead of the AFX macros
update docs
Add sign support for the binaries
update Inno Setup's Slovak translation
refactor Authors.txt
update ffmpeg (n0.8-18727-g864fdfa)