Fixes downloads_controller test so that authZ failures redirect to root_path vs. an image saying 'no access'
merging for commit for SCM-3770
Merge branch 'develop' of github.com:psu-stewardship/scholarsphere into develop
Added Accessibility information to "Deposit Your Work" section of the FAQ.  Refs #3770
Added FAQ message about Accessibility in the section "Depositing your work".  Refs #SCM-3770.