Updated cancan from 1.6.7 to 1.6.8 (refs #253)
Use class names, not constants
Merge pull request #353 from ifad/update-cancan-to-1-6-8

Update CanCan to 1.6.8
added lines & fixed mistakes in russian translation
Merge pull request #355 from nimdraugsael/master

Pull request into russian translation
Fix MembersController inherited class to be Forem::Admin::BaseController
Merge branch 'master' into ifad

Conflicts:
	app/controllers/forem/admin/members_controller.rb
	app/controllers/forem/categories_controller.rb