Run font cache creation in background
Formatting
Clean some bugs
Only have FFmpeg check its fontconfig cache on non-Windows operating systems
Updated changelog
Removed unused code
Official release of 3.4.0 for Windows & Linux
Revert "Clean some bugs"

This reverts commit 975f47f29f29c7699046b439329d102c10b19c7e.
Official release of 3.4.0 for Windows & Linux (Real)
Bumped version to 3.4.1
Enabled automatic updating to 3.4.0 on Windows