Merge pull request #140 from acz-icm/master

Reorganized stopwords; removed catching of NullPointerException
Removed deprecation warnings.
- Fixed issues reported by Sonar.
- Refactoring.
- Fixed issues reported by Sonar.
- Refactoring.
- Fixed issues reported by Sonar.
- Refactoring.
- Fixed issues reported by Sonar.
Added descriptions to keywords extraction's options
Merge branch 'master' of git://github.com/CeON/CoAnSys
Changed keywords extraction workflow's name