Clojurians Log v2

Bug found, fix expected after this weekend https://github.com/metosin/signaali/issues/3

FYI, this other issue https://github.com/metosin/signaali/issues/4 has been fixed in the v0.1.1 release yesterday, but will be reviewed this weekend.

I might change the implementation to use version numbers in the reactive nodes, at some point. It would mean that for busy and long running applications, there would be a rare “version normalization” pass on all the reactive nodes once in a while (once a year?) to avoid running in version number overflow issues: a small price to pay for a huge performance benefit and implementation simplification.