Fixed bug affecting advancement to the next day
DeltaDB select, sfilter, project, treduce, pivot, dfilter(leaky)
dfilter hacked (with a memory leak) to prevent seg faults. Number comparisons possible in dfilter,sfilter. End Date-Time possible with select.
Added first version of static reducer.  The output is too chatty
and duplicates need to be eliminated.
Cleaned up build process to rely on dttools, except for the modified nvpair.
We will fix that later.
Pivot should stop on end of file.
Factored reduction operators out of static reducer.
Static reduce emits all updates at a common time, so only update
when a new timestamp is seen.
Added nvpair.h back, pivot handles deltas (other than creates) now.
Accept and generate .Log End. events.
Switched to floating point math.
Fixed stray = in log output.
Fixed whitespace error in emitting reduced key.
Cleaned up pivot, it now requires a list of columns on the command
line, so that you get a fixed ordering for plotting.
Removed one hack from nvpair.c, one remaining.
Fix number output issues.
Removed debugging.
Downgrading D_NOTICE to D_DEBUG now that select is working well.
Pivot should output one last item after the log is processed.
Bigger buffer for line prefix string in treducer.
Handle for garbage time values.