One-to-Many: Logic
 Changes to be committed:
	modified:   app/helpers/pledges_helper.rb
	modified:   app/models/project.rb
	modified:   app/views/projects/show.html.erb
	modified:   spec/features/show_project_spec.rb
	modified:   spec/models/pledge_spec.rb
	modified:   spec/models/project_spec.rb