[en] manually-added.txt and added.txt

The English resources directory has the files added.txt and manually-added.txt. The contents seem to have the same structure and purpose. Should the contents of the 2 files be merged and one of the files removed?

manually_added.txt is not used at runtime. It was only used in a script, which isn’t used anymore either. I’ll just delete this file and the script. The words it contains should be detected because they have been added to the binary POS tagger long ago.