Bump version to 1.7.9 and adapte Gemfile.lock
Orphan is now an xlsx file, too
Avoid ArgumentError for sprintf
Fix rspec
Add spec task to rake
Added test target to rake
Added clean target to rake
Added log option
Added spec test for duplicates when -e given
Added logging, accelerated prepare_articles, fixed recognition of duplicates
Bumped version to 1.8.0
Bumped version to 1.8.0
Fix problem with empty substances and limitation when running -e
More logging and exit 2 unless substances and limitations okay for extended
Improved rake clean targer
Bumped version to 1.8.1
updated History.txt