Added CSV download functionality to Exzweight.

 On branch master
 Your branch is up-to-date with 'origin/master'.

 Changes to be committed:
	modified:   exzerco-mate-webui/app/controllers/exzweights_controller.rb
	modified:   exzerco-mate-webui/app/controllers/machines_controller.rb
	modified:   exzerco-mate-webui/app/views/exzweights/index.html.erb
	modified:   exzerco-mate-webui/app/views/machines/index.html.erb
	modified:   exzerco-mate-webui/config/routes.rb