Fix Gemfile and Gemfile.lock of apptask and Add root config.ru

That's to deploy C4 Rails app_task before attempting to deploy Idearator
Merge branch 'master' of https://github.com/DevYah/coolsoft-13
Merge branch 'master' of https://github.com/DevYah/coolsoft-13
Fix Gemfile and Gemfile.lock

Add gem pg to production group and move gem sqlite3 to development and test group for deployment
Delete config.ru
Merge pull request #330 from DevYah/deployment_configuration

Deployment configuration: use postgres.