3.1.0

• Add build that bundles ffmpeg with the install (thanks to @ianwal for contributing!)
• Simplified runtime.name_replacements implementation
• The "Stop" button in the GUI now actually works :)
• Added quotes / apostrophes to the default replacement list
• Allow changing gecko codes via the config
• Fixed "File owned by another process" issue on windows that happened during high load
• Fixed issue where stdin would get messed up when run from CLI