Small patch with some test music and bug fixes

This is half a patch due to some high priority fixes. A bug preventing login after disconnecting during the respawn window should be fixed. A networking heartbeat was implemented to reduce disconnects and fix a rare bug with characters unable to log out. Road decay has been reduced a bit and bandage ingredients have been fixed and reduced. You’ll notice volume sliders for sound and music now. Some music is being tested in various maps and the underworld, but none in Galebrook yet. Let me know if you find music you think would be a good fit.