v0.1.1

Fixed

• WRITE acknowledged before data reached the file. write_at returned as
  soon as tokio had buffered the data, while the actual write(2) still ran in
  the background. A follow-up QUERY_INFO, CLOSE or re-open could observe the
  old file size or contents, and write errors (e.g. disk full) were silently
  lost after the client had already been told the write succeeded. Writes now
  complete (without fsync) before the WRITE response is sent.