v1.8.0

• Ruby 1.8 officially no longer supported! Use Lingo 1.7.x instead.
• Executable may be run from outside installation root directory now.
  See README for further details.
• Search path for dictionaries and configuration files; plugin system.
• Lingo::Attendee::TextReader can read from STDIN if no files given;
  leave out the files parameter in the config for this to trigger.
• Status/performance details as well as progress information are now
  printed on STDERR instead of STDOUT in order to not mix with regular
  output. Learned --log option to write such information to a file.
• Additional internal refactorings. (To be continued...)