Clarify guidance for external relationships

[danielhonker]

• [x] package up case studies from other cities
• [x] talk with Elaine and others about what information is needed for the meeting
• [x] package up past engagement with outside partners

[danielhonker]

Slides for 9/12 meeting: https://docs.google.com/presentation/d/1kl-xA4kRcxWq8HHkCNfb7nRhLORZLQFeA-mdIC_DFgk/edit