ENOENT for an un-included file

[nyarly]

This seems to be a regression to #2 with the quirk that it's the Vim backup file:

INFO [watcher]: Changed file "/home/judson/ruby/gems/rhet-butler/javascript/src/rhet-butler/transition-station.js".
ERROR [karma]: { [Error: ENOENT, stat '/home/judson/ruby/gems/rhet-butler/javascript/src/rhet-butler/transition-station.
js~']
  errno: 34,
  code: 'ENOENT',
  path: '/home/judson/ruby/gems/rhet-butler/javascript/src/rhet-butler/transition-station.js~' }
Error: ENOENT, stat '/home/judson/ruby/gems/rhet-butler/javascript/src/rhet-butler/transition-station.js~'