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
Move UMLs to the root directory to reduce Idearator subtree size.
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
Only add the precommit checks in development environments.
Delete config.ru
Merge pull request #330 from DevYah/deployment_configuration

Deployment configuration: use postgres.
Add db/schema.rb back into source control.

The database is relatively stable now, and this is needed for smoother
deployment.
Update coolster for deploying

1. add idearator's secret_tocken
2. set IDEARATOR URL and DOMAIN in config
Initialize COOLSTER_URL in production env
Username not password field
update forms

remove colors, increase fields width
Fix Facebook Comments URL
Fix Twitter Actions sharing URLs
Remove "puts"
Don't initialize the application during asset precompilation.

Required by Heroku.
Fix CSS includes in application.css.scss
Add controller specific assets to precompilation list
Setup mailer configuration for production environment