updates progress bar accuracy

The progress bar now accounts for live coders that have opted for
"finish later"

Address part of issue #63

test/integration/question_flow_test.rb

@@ -31,4 +31,12 @@ class QuestionFlowTest < ActionDispatch::IntegrationTest
     # TODO: add in capybara and test form post
     # assert_redirected summary_path
   end
+
+  test 'juan should be on summary with 80% complete' do
+    setup_auth candidates(:juan)
+
+    get summary_path
+    assert_response :success
+    assert_select '.progress span', '80%'
+  end
 end