Add instrumentation/metric reports to Microcosm
Add instrumentation/metric reports to Microcosm

We now support a somewhat coarse way of reporting time metrics through
the debug sink. Nothing advanced, as time spent in Microcosm is less
than 5% of the whole KokrotImg time, so we don't really need much
profiling down there.

geomaster/kokrotimg,geomaster/kokrotimg