Display 3 related courses in the left menu (#163)
Load related videos from left menu (#163)
Merge branch 'develop' into feature/related-courses

Conflicts:
	dist/koemei-widget.js
	src/koemei/coffee/view/player.coffee
	src/koemei/coffee/view/userportal/user_portal_left_menu.coffee
Merge branch 'develop' into feature/related-courses
Merge branch 'feature/related-courses' into develop