Short post describing how to collaborate with "clients"

[lwjohnst86]

Meaning:

• A project board in each "clients" GitHub organization (if they have one), to keep them involved and not have to find our stuff. "Go to where they are at".
• Also have separate update meetings with them (and maybe regular "feedback sessions" like retrospectives but not as extensive, to assess if things need improvement/change. Same with long-term planning meetings).
• Keep update meetings as short as possible, and only do at most one update meeting per week per "client"