20070406 0.1 (initially released with no version)
  first version

20070412 0.2
  Reworked missed call handling
  No need to duplicate output, assigning '' to the log file is enough
  Added support for commands in the addressbook
  Try to call the name if it doesn't correspond to a contact in the
  addressbook

20080105 0.3
  Don't use linphonecore library but spawn linphonec as a separate program

20080624 0.4
  Added --ignore-checksum option