simplify YASM.bat
sign.bat and coverity.bat: add VS110COMNTOOLS call in case VS2010 isn't installed
contrib/rev2hash.sh: use short hash by default and add option to use full hash
cosmetics: remove unneeded trailing semicolon
cosmetics: convert tabs to spaces in gitmodules
update Authors.txt and Compilation.txt
update ffmpeg (n0.8-19080-g2bac153)
update lcms to 4ba0259