switch db to postgreSQL, edit migrations
change name of liked_by to added_by
add first name and last name to user editing form
styling for the private message area
show avatars in artists like page
add avatars to friends list
style the edit user page
more edit page styles
last styling for edit user form.
last styling for edit user form.
Merge branch 'postgres' into design130808

Conflicts:
	app/views/artists/show.html.erb
	app/views/users/_friends.html.erb
	app/views/users/show.html.erb
	config/database.yml
	db/migrate/20130421182150_add_city_state_zipcode_to_users.rb
	db/migrate/20130828141458_add_username.rb