Add options for concurrency and simultaneousness
Reduce whitespace padding
Merge branch 'master' into 'simpler-rate-limiting'

Conflicts:
	src/TelemetryProgram.hs
Limit the number of async writes in flight

This does not enforce a rate; it merely incrementally chews through
the pending work limit actions at a time. This allows the storage
cluster to only have to deal with a controlled number of simultaneous
writes.
Merge branch 'simpler-rate-limiting'