Add retriever library implementation
Fix conflicts
Merge branch 'master', remote-tracking branch 'upstream/master'
Fix conflicts
Merge branch 'master' into abstract-comparison-feature
Update README
Update sample data
Refactor wikpedia articles parser spec
Add newline at the end of Gemfile
Fix formatting
Merge pull request #146 from jharinek/master

Wikipedia and DBpedia abstracts parser
OK [Jozef Harinek]