Move some of the students views to gaku/shared/student
Use separate delete_modal for student
[exam portion validation] when is over 100 start to reduce from last, when last is 0 raise error
[locale] for exam portion custom error message
on blur submit exam portion weight form
[locale] typo in exam portion error locale
Merge remote-tracking branch 'kalkov/develop' into develop
Merge remote-tracking branch 'tapalilov/develop' into develop

Conflicts:
	core/app/models/gaku/exam_portion.rb
Merge branch 'develop' of github.com:Kagetsuki/GAKUEngine into develop
updated locales