[fix] remove line in students addresses req spec
fix js - remote .live
fix no method/period handling
[modal/crud] simple grade in students#show
[migration] students has many achievements throught student achievements
[model] student and achivement  has_many :through join model
[achievement] basic controller & routes
[admin] admin achievement crud
[migration] add assertion to student achievements join model
[menu] add achievements to admin global menu
fix image_resize helper variables name
fixing admissions specs
Merge branch 'develop' of https://github.com/tapalilov/GAKUEngine into develop