Fiddled with tests, currently: 21 runs, 39 assertions, 0 failures,
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 On branch master
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 Changes to be committed:
	modified:   .gitignore
	modified:   Gemfile.lock
	modified:   app/models/exzweight.rb
	modified:   app/models/machine.rb
	modified:   test/controllers/exzbikes_controller_test.rb
	modified:   test/controllers/exzweights_controller_test.rb
	modified:   test/controllers/machines_controller_test.rb
	modified:   test/fixtures/exzbikes.yml
	modified:   test/fixtures/exzweights.yml
	modified:   test/fixtures/machines.yml