Upgrade to db2

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we have a main PR and then some followup issues

• [x] https://github.com/ssbc/ssb-tribes/pull/96
• [x] https://github.com/ssbc/ssb-box2/pull/34
• [x] https://github.com/ssbc/ssb-tribes/issues/97
• [x] https://github.com/ssbc/ssb-tribes/issues/98
• [x] https://github.com/ssbc/ssb-tribes/issues/99
• [x] https://github.com/ssbc/ssb-tribes/issues/100
• [ ] https://github.com/ssbc/ssb-tribes/issues/101
• [x] https://github.com/ssbc/ssb-tribes/issues/102
• [x] https://github.com/ssbc/ssb-tribes/issues/103 https://github.com/ssbc/ssb-tribes/pull/104

[Powersource]

start with a call between jacob and mix

[Powersource]

maybe prioritize #102 so we don't forget the context immediately