Slight modifications.
Merge branch 'student' of ssh://github.com/tsauvine/o4 into student
Debugging and working on UX.
Finalizing.
Merge branch 'student'

Conflicts:
	app/assets/javascripts/views/plans/courses/old_index.js.coffee
	app/assets/stylesheets/core/courses.less
	app/assets/stylesheets/views/plans/competences/index.css.less