add staff to user detail API, and use for displaying add project button
actually, don't use staff for adding project and other admin stuff...staff controls access to the Django interface which we want to keep separate
update intro and site nav documentation and updated some screenshots
tutorial or adding a new project
subject group shouldn't be required, subject code is required
remove some old screenshots
update add subject group tutorial
BUGFIX: prevent AssertionError due to HyperlinkedIdentityField by adding context to serializer instantiation
BUGFIX: another fix for AssertionError, this time in SitePanel create
added project_name to Sample API