v1.1.1

• Page unload: bindPageLifecycle() paused the session when a page closed or reloaded, so in a game without
  checkpoints the old player stood frozen for the whole resume grace while the reloaded page joined as someone new.
  Now a real unload (not the back/forward cache) leaves at once, unless the client checkpoints (unload: 'auto', the
  default); unload: 'pause' or 'leave' says so explicitly. Found by kimu.nyc's playtest.