Merge pull request #1 from ericfransen/development

Development
Add link for admin to edit items

This deals specifically with admin/items/index.html
Adds tests to admin_edit_item_view_spec
Add link for admin to edit item from item show page
Admin can now create an item

- Adds feature test for creating itms as an admin
- Adds new and create in admin/items controller
- Adds view to display form.  Planning on moving to partial when
implementing #update
- Pretty heavy duplication from the base ItemsController, so we
can find ways to deal with that.  The upside is that we only have
to worry about authorization in the admin controllers.
Admin can now edit an item
Clean up tests
Admin can now delete a menu item
Merge branch 'master' of https://github.com/ericfransen/dinner_dash into development
Merge branch 'development' of https://github.com/ericfransen/dinner_dash into development
Fix schema
Merge branch 'development' into admin-orders
Add basic view for orders (admin)

Still missing: filter orders by status, links to transtion an
order.
Add tests for admin/orders/show view (WIP)
Admin can create a new category
Admin can see categories under each item
Update admin/items index to show by category
Update admin/items index to list by item
Admin can now remove categories from an item
Fix merge conflicts
Clean up