minor changes to usability assignment
Merge branch 'develop' of https://github.com/starteam/starcellbio_html into develop
Merge branch 'develop' of https://github.com/starteam/starcellbio_html into develop
Merge branch 'develop' of https://github.com/starteam/starcellbio_html into develop
Merge branch 'develop' of https://github.com/starteam/starcellbio_html into develop
Merge branch 'develop' of https://github.com/starteam/starcellbio_html into develop