Bump rails version up to 4.1.2. Update app configs as a part of rails upgrading process
Fix rspec minitest/autoran warning
Remove outdated comments about assets precompilations from staging/production envs
Update secrets.yml move ENV from yml to .env
Support maintain_test_schema!
Remove outdated Rails.application.config.secret_key_base
Merge branch 'update-rails-upto-4.1.2'

Conflicts:
	Gemfile
	Gemfile.lock