0.0.4

Added:

• Added support for JSON to persist Python bytes as base64 strings.
• Added support for JSON to persist UUIDs.
• fixie.default_path() function enables the creation of path names
  from metadata, if needed.
• $FIXIE_HOLDING_TIME added for specifying the
  length of time to store databases on the server.
• $FIXIE_PATHS_DIR for denoting the fixie paths
  directory, where database path metadata is stored.

Changed:

• RequestHandler.write() now uses the fixie.jsonutils.encode() to
  encode dictionaries as JSON. Additionally, a newline is appended to the
  end of the message, so that curl and other utilities look nice on the
  command line.
• fixie command line utility now has executable permissions.