Add Heroku-specific code for collectstatic
Add Heroku-specific code for collectstatic

OpenHumans/open-humans,OpenHumans/open-humans,OpenHumans/open-humans,OpenHumans/open-humans,PersonalGenomesOrg/open-humans,PersonalGenomesOrg/open-humans,PersonalGenomesOrg/open-humans,PersonalGenomesOrg/open-humans