summarized_results['num_complete_bees'] sometimes equals 0, you can't divide by 0. The string put into
summarized_results['mean_response'] tells the user that no bees have completed yet.
Fixes https://github.com/newsapps/beeswithmachineguns/issues/75
summarized_results['num_complete_bees'] sometimes equals 0, you can't divide by 0. The string put into summarized_results['mean_response'] tells the user that no bees have completed yet. Fixes https://github.com/newsapps/beeswithmachineguns/issues/75