[view] refactor syllabus to add show_table and refresh on exams added
[spec] syllabus showtable and exam creation refresh showtable
Merge branch 'master' into fix_exam_creation_and_add_syllabus_showtable

Conflicts:
	core/app/views/gaku/exams/update.js.erb
	core/spec/requests/syllabuses/exams_spec.rb