arranged database columns and add models method
	modified:   ../app/controllers/ship_controller.rb
	modified:   ../app/helpers/ship_helper.rb
	modified:   ../app/models/building_vote.rb
	deleted:    ../app/models/building_vote_detail.rb
	modified:   ../app/models/research_vote.rb
	modified:   ../app/models/ship.rb
	modified:   ../app/models/used_material.rb
	modified:   ../app/models/vote_detail.rb
	modified:   ../app/views/ship/index.html.haml
	deleted:    ../app/views/ship/statistics.html.erb
	modified:   ../app/views/ship/vote.html.haml
	deleted:    migrate/20130907131716_create_building_votes.rb
	deleted:    migrate/20130907131727_create_building_vote_details.rb