Clojurians Log v2

Update: Just ported some better diagnostics from Matrx cljc to Matrix cljd. Now I am indeed going to walk through some new doc in the Matrix.cljc test suite, so the code can be exercised while reading. This code will cover just the Matrix reactive elements, universal to mxWeb and Flutter/MX. When I start on applying the MX elements to a UI, then I will slide over to f/mx.