Initialize I18n config.
Use assets for css files.
Update home page for I18n.
Update pages about, partners and team for I18n.
Redesign header layout.
Redesign header layout. Patch
typo
format
Redesign header layout. Patch2
Update courses, contact us and trainers pages for I18n.
Update courses, trainees, homepage, and onsite training pages for I18n.
Update Knowledge and admin pages for I18n.
Update for I18n.
Update for i18n.
Merge branch 'master' of github.com:gazeldx/scrum into feature_i18n

Conflicts:
	app/assets/stylesheets/style.css.scss
	app/views/home/index.html.slim
	app/views/layouts/application.html.erb
	app/views/shared/admin/_navigation.html.slim
	config/locales/zh.yml
	config/routes.rb
	db/schema.rb
Update for i18n.
Update for i18n.
Update for i18n.
Update for i18n.
Hide language button for now.