Add basic code testing backend
Merge branch 'master' of https://github.com/WaleyChen/code-trial

Conflicts:
	app/views/interviews/new.haml
	public/assets/application-0984ac066ad2fb1cce553356ed201701.js
	public/assets/application-0984ac066ad2fb1cce553356ed201701.js.gz
	public/assets/application.css
	public/assets/application.css.gz
	public/assets/application.js
	public/assets/application.js.gz
	public/assets/manifest.yml