Add generic query string => database query processing.
Add some db and processing time stats.
Make the reduce functions asynchronous and try to speed them up by doing fewer iterations over the entire data set.
Disable duration processing for now.
Revert "Disable duration processing for now."

This reverts commit b210daa2b9e83f6bfab00489a9d318843f2df10b.
Speed up hits_per_day processing by relying *much* less on moment.