use_omniauth = true

should be the default (easier this way for deployments to staging/prod)
ASSIST-58 - Paperclip file storage

Updates to use a shared directory so that the uploaded files remain in place between deploys.

That shared directory is /var/www/apps/nucats_assist/shared/public/system
cf. file_document.rb
bump version 2.2.13
Merge branch 'release/2.2.13'