Merge branch 'release/2.4.1' into develop
Merge branch 'hotfix/2.4.2' into develop
redirect to login from api reference if unauthenticated
add status codes when rendering 404 and 500 templates
add sessions/show.html.erb with javascript which redirects user if passport-manager server failed; need to refactor later
bump version number
Merge branch 'release/2.4.3'