add favorite to admin
fix favorites under admin
finish REST for book_comments under admin
add book_category under admin
finish REST for all under admin
Task: move needed resources back to normal view.
  done:
    books:index,show.
    book_categories:index,new,create.
    book_comments:index,new,create.
deploy unit test on each model 3h
moved needed 'favorites' resources back to normal view
moved needed 'users' resources back to normal view
Merge branch 'feature/rest' into develop

Conflicts:
	app/models/book.rb