WebServer: The filenames weren't correctly URL decoded.

Filenames with "special" characters were always leading to 404 errors.

This commit fixes #84.
Fix "Auto-fit" and "Auto-fit (Larger Only)" zooms in fullcreen mode.

"Auto-fit" and "Auto-fit (Larger Only)" zooms were giving different results depending on if they were used in windowed or fullscreened mode.

This commit fixes #2881.
update ffmpeg (n0.8-18417-gc46943e)
Revert "actually disable C4995 and C4996 for udf.cpp"

This reverts commit 03ca3eff5fccbfe6bfc1583789d4fe91af8b1900.
build.bat, mpc-hc_setup.iss : add ICL13 support