add ransack to admin/orders
add ransack to admin/audits
add ransack to admin/pages
add ransack to admin/news
add ransack to admin/lectures
Merge branch 'feature/217_add_ransack_to_admin_panel' into staging

Conflicts:
	app/views/web/admin/news/index.html.haml
	app/views/web/admin/pages/index.html.haml