Update to version 0.6:

- 0.6:
-  add support for HipChat

- 0.5:
-  use keychain on OS X for user api token

- 0.4:
-  obscure proxy_pass in verbose output

- 0.3:
-  add '-f' flag to allow continous clogging much like 'tail -f'

- 0.2:
-  also prefix messages delivered via sudo(8) with the username derived
   from the SUDO_UID environment variable