Spec failed due to missing namespace prefix.
Failing spec, explicit conversion from symbol to string.
Remove deprecation warnings.
Upgrade to latest rake version.
Fix deployment to sub-uri.

Use the to() helper for redirecting, and include sinatra-static-assets
to help with loading stylesheets etc from the proper location.
Fix login screen using sinatra-static-assets.
Fix the rest of redirects too...
Add runtime-dependency sinatra-static-assets.

This allows deploying to a sub-uri, and still load the
correct static assets.
Merge remote-tracking branch 'origin/fix-deploy-to-sub-uri' into bifrost-cas