Indestructable 0.3.1

This is a bugfix release.

• New:
  • Screenflash when lives are gained, configurable in settings.
• Fix:
  • Current lifecount is now properly reported after respawning in co-op
  • Timestop should no longer cause sound to break after it triggers.
  • Compatibility with other timestop effects should be improved, especially Gearbox.