updates to tomorrow's agenda

I've been updating the agenda https://credweb.org/agenda/20180726

Including
- link to list of people (which has been growing) - we'll have enough 
people coming and going, that I don't think we can do intros 
effectively, and instead people should refer to this list.  Feel free to 
make your name a link to more info about yourself.
- some more details on the topics
- section on confidentiality (meeting is on-the-record except where 
agreed otherwise)
- section on collaboration tools

Schedule still isn't well formatted, but hopefully it's readable

      - Sandro