npm start instead of npm serve
Merge pull request #33 from SchweizerischeBundesbahnen/feature/STZE/fix_readme

npm start instead of npm serve
minor formatting
minor formatting part ii
!= null is not allowed, thus check for truthiness with guard pattern
Merge pull request #37 from SchweizerischeBundesbahnen/feature/STZE/falsy_and_jshint

good catch
enabled virtual screen on travis for browser testing with FF
Merge pull request #38 from SchweizerischeBundesbahnen/feature/kgu/browser-testing-travis

enabled virtual screen on travis for browser testing with FF
Merge branch 'develop' into feature/mfr/rating