v1.1.1

The mix.exs file has the Elixir requirement bumped from 1.3 to 1.4. This was
done to fix a Dialyzer warning caused by a change in arguments to
System.monotonic_time/1 with newer versions of Erlang and Elixir.
Unfortunately this broke compilation under Elixir 1.3.

• Bug fixes
  • Removed unnecessary open failure notification message. The failure gets
    returned from the open call already and the notification was due to an
    unfortunate path through the Linux filehandle polling code.
  • Various Windows fixes:
    • Fixed unhandled tx ready event seen during big transfers at 250000.
      Thanks to Arne Ehrlich for figuring this out.
    • Fixed bogus file handle errors when an open fails and then an attempt to
      open again happens without a restart of the GenServer.