Changes

* Authorities cleanup - Trevor Smith

* [https://cynthiang.ca/2019/11/28/presentation-implementing-values-in-practical-ways/ Implementing values in practical ways] - Cynthia Ng

* [https://drive.google.com/open?id=1CcB77MvBCDTnJVeH2AqhZCIFlRMbyRM1 JavaScript and CSS elements in circulation notices: A dilettante's perspective] - Olga Kalachinskaya

* [https://drive.google.com/open?id=1H0V21mhKmVQJiN2tN9d-McM7h4EEAPh1 Ebook Ordering: How we expanded our collection with intentional ordering] - Michelle Yule