Add simple facebook login feature
Add facebook scope
Add ckeditor gem
Configure model settings for rails_admin
Migrate database: remove vendor_id field from Category, add vendor_id to Items
Edit rails_admin Item model's configuration
Configure Devise mailer_sender
Add database seed file for generating sample data
Merge branch 'facebook_login'

Conflicts:
	Gemfile
	Gemfile.lock
	app/models/user.rb
	db/schema.rb
Store facebook link to database
Merge branch 'facebook_login'
Migrate database after merging
Add Products with CRUD Restful controller
Edit rspec to make it passed