Added ID to all resource views in ActiveAdmin.

It's a good idea to have easy access to the id of model instances. E.g. if a Resque job is failing, the only clue we have of which feed is failing is the ID passed as argument to the job; with it, now we can search in ActiveAdmin the specific feed and see all its details.
Added default actions column (View, Edit, Delete links) to the beginning of each row in the ActiveAdmin Feeds index view.

This table is wider than the screen, and having default actions links available at both edges of each row improves usability.