Initial commit of "delayed job" mechanism.

 Changes to be committed:
	modified:   Gemfile
	modified:   Gemfile.lock
	modified:   app/controllers/v2/feed_items_controller.rb
	modified:   app/models/feed_item.rb
	new file:   bin/delayed_job
	new file:   db/migrate/20141027213748_create_delayed_jobs.rb
	new file:   db/migrate/20141028134849_add_image_processing_to_feed_item.rb
	modified:   db/schema.rb
	new file:   script/start_imageprocessor
	new file:   script/stop_imageprocessor
Added image processor.
 Changes to be committed:
	modified:   config/deploy.rb
	new file:   lib/capistrano/tasks/delayed_job.rake
	deleted:    script/start_imageprocessor
	deleted:    script/stop_imageprocessor
Changed Capfile to use *.rake rather than *.cap...since they're just
rake files.
	modified:   Capfile