faster removal of articles about people

wow. such speed.
Merge pull request #34 from awaelchli/master

documentation of installation in readme
Update README.md
Removed unused gems in Gemfile
Merge branch 'master' of https://github.com/pse-group2/medminersolr
update Gemfile
Merge branch 'master' of github.com:awaelchli/medminersolr