Add ajax delete to favorites menu

When user clicks delete link on band item, band div is removed from view
and ajax request is sent to server to delete the database record.
Currently extracting artist name with jquery and sending as params to destroy
path. Not restful.

Will fix by adding database record id to band div when band item is added to
favorite list. - User adds favorite, js creates band item div and appends to
list, ajax post fired and return data is id which is added to the band div class.
Remove get_ip method from favorites controller

Move to application_controller
Add destroy method to favorites_controller.rb

Current implementation not restful.
Will refactor to add favorites record to band div in
favorites menu on create. Then pass record id in params
on ajax destroy.
Add sms confirm method to user create

When user signup form submitted, send twillio verification
request to confirm phone number in database. Then convert
guest user to confirmed user
Remove whitespace from artist.rb
Remove user name method.

Guest name does not need to be shown in ui
Rename user registration form

Form now accepts password and name in addition to phone
Remove whitespace
Merge branch 'master' into rails-js-integration-merge

Fix migration merge conflict. Add image_url to artists table

Conflicts:
	giggidy/db/migrate/20140618015328_artists.rb
Merge branch 'rails-js-integration-merge'