fix #570
fix #568
fix #560
fix flake8
Merge pull request #575 from antgonza/fix-minor-issues-study-description

Fix minor issues in study description
addressing @adamrp comment
Merge pull request #576 from antgonza/issue_560

fix #560
Merge branch 'master' of https://github.com/biocore/qiita into issue_409
adding @adamrp comments