Clojurians Log v2

Hmm, new example just pushed. More tomorrow. FYI

Just pushed a new example covering the very important question of how we model events in Matrix. https://github.com/kennytilton/matrix/blob/464a85dd44a763a0f35fa174767fbc6a6b3ef3ee/cljc/matrix/test/tiltontec/learn/b010_boiler_and_misc.clj#L90 Events are tricky because the normal paradigm is that of a steady-state spreadsheet, not a stream. The "knock-knock" test covers that. Questions/comments welcome as always!