Update README_artifact.md

some change?
Merge pull request #432 from etosch/untested

Untested
Merge pull request #446 from etosch/untested

Untested
Merge pull request #448 from etosch/untested

some lingering stuff on my laptop
Update README.md
Merge branch 'master' of github.com:SurveyMan/SurveyMan into untested