Ask for feedback from speakers, attendees, and vol'ns

[dcwalk]

We left this loooooooong, but we all said this is worth doing. I think our last touch point is when we send out the email about videos, etc...

Copying over todos from the call:

• [x] decide on feedback mechanism (form + call?)
• ~attendee ratios/speakers/noshows~
• ~email noshows--why not!~ (@dcwalk: exec dec'n, this is way too late)
• send email (in #129)
• [x] ask volunteers for feedback (once email out)
• [x] review feedback from form

[dcwalk]

This was compiled and discussed at the Nov 2019 check in/prep. Closing!