details...
first entry materializes in the visFacts collection

halleluja!
look ma, no hands!

The strangest thing! Values get added up in visFacts when I run
aggregateFacts.js first on ServersRelays and then on ServersBridges. I
was sure that that could never happen…
added test documentation
// date
Merge branch 'skip-tempFacts-step'

Conflicts:
	mapReduce/aggregateBridges.js
	mapReduce/aggregateFacts.js
	mapReduce/aggregateServersBridges.js