v0.9.2

Added

• stdout/stderr stream chunksize (in bytes) for most process execution objects
  can now be modified by passing the chunksize argument, e.g.
  Viewer.from_command('ls', chunksize=100)
• Bucket.ls() will also retrieve object owner information when passed
  fetch_owner=True

Fixed

• bug that caused AWS credential file parsing to fail on non-default account
  creds stored in non-default credentials file
• occasional failures when attempting to disown processes
• bug that sporadically delayed SSH tunnel cleanup for closed / destroyed
  SSH objects until interpreter exit

Changed

• default stdout/stderr stream chunksize increased from 1K to 20K
• assorted linting, stability tweaks, etc.