Version 0.5.0

New features:
    - Block IO controller
    - Added many more container statistics
  The following features work only with Virtual Host containers
    - Apparmor support
    - Pty Console support for processes being run inside a Virtual Host
    - Mount Spec to bring in external mounts into the Virtual Host
    - Networking support - veth, ovs and regular bridge.

In addition to these features, the Virtual Host environment has been made more
robust and secure. This release also includes many bug fixes.