[controller] changes for preset controller
[helper] preset helper with caching
[locale] for states crud
[model] add default scope for countries
[model+spec] add attr_accessor + test for :country_iso attribute
[menu] add menu link for states admin crud
[routes] for admin states
[controller] admin states
[spec/req] specs for admin states crud
[views&js] for admin states crud
[style] change hash styles, empty rows and etc
Merge pull request #181 from Kagetsuki/master

student importer basically working
Merge branch 'admin_states_crud' of github.com:Genshin/GAKUEngine

Conflicts:
	core/spec/models/state_spec.rb
Update enrollment_status.rb
[controller] change to find only students with active enrollment_status
[helper] select to use code instead of id
[model] enrollment status and student assoc, scope for find active enrollment statuses
[view] edit students select to use code instead of id
[view] search in students#index to use enrollment status code
[migration] change table for assoc with enrollment status