[controller] remove inherited_resources from exams controller
[spec/controller] exam controller
[model] add counter_cache for exam_portions in exam
[views] refactor exam views
[routes] change soft delete patch request
[factory] invalid exam
[spec/request] exam
[controller] remove before filters
[controller] remvoe set_count from destroy because is used in disposal no counters there
[helper] translation for exam_portions
[fix/views] small changes on exams views
[controller] set_notable for unscoped exams
[view] change buttons_for helper
[spec/request] change few helpers
Merge pull request #242 from Genshin/bootstrap3_exams_refactor

Bootstrap3 exams refactor