One-to-Many: Models
 Changes to be committed:
	new file:   app/assets/javascripts/pledges.js.coffee
	new file:   app/controllers/pledges_controller.rb
	new file:   app/helpers/pledges_helper.rb
	new file:   app/models/pledge.rb
	modified:   app/models/project.rb
	modified:   config/routes.rb
	new file:   db/migrate/20141203024215_create_pledges.rb
	modified:   db/schema.rb
	new file:   spec/models/pledge_spec.rb
	modified:   spec/models/project_spec.rb
	modified:   spec/support/attributes.rb