v0.1.2 :
  uses the password mode for the password entry

v0.1.4 :
  Using human_readable to output the boxsize
  human_readable was updated (thanks to Martin Preishuber <martin _dot_ preishuber _at_ eclipt _dot_ at>)
  
v0.1.5 :
  The user can now choose (with the config) to execute a command when he receives a new mail.