Converted to Rails4.
Added gem 'rails_12factor' per heroku, since app crashed there.
Plagued with error 'bin/rails: No such file or directory'. Tried 'rake rails:update:bin' run locally.
Ran 'rake rails:update' to renew configuration files.
Precompiled assets for heroku.
Re-added 'config.assets.compile = true' to production.rb
Added unicorn and heroku Procfile
Added 'config/unicorn.rb'.