ec2-metadatafs 0.4.0

Changes:

• Support for caching file and directory attributes as well as directory
  listings via cachesec
• Support for sending logs to syslog

Bug fixes:

• Wait for daemonized process to notify when mounting before exiting. This will
  help users determine if it mounted correctly or not
• Unmount when process is sent SIGINT or SIGTERM
• Don't return user-data in directory listing of / if it isn't set on the instance