#906: add airbrake.rb
#906: refactoring of keys structure
#906: rewrite devise.rb
#906: rewrite secret_token.rb
#906: update deploy.rb
#906: add newrelic.yml.sample
#906: rewrite application.yml.sample
#906: add newrelic.yml into .gitignore
#906: APP_CONFIG should be initialized before all
#906: rename secret_key
#906: rewrite deploy/production.rb
Merge pull request #1 from warpc/906-remove-private-data

[refs #906]: remove private data to separate file application.yml