Changed dbname to database in the psycopg2 connection string.
Scanner now grabs 2 days of (seed) data at a time in preparation for
computing the triggered metrics (e.g., CalibrationMetric, EventMetric,etc)
that might span into the next day.

Fixed SeedSplitProcessor so that SteimException (where nsamples != expected)
no longer causes null pointer hang - instead it throws a SEVERE log message
and continues.