schemas/postgresql.conf: Expressed shared_buffers in MB, since decimal GB doesn't seem to work anymore on 9.1

schemas/postgresql.conf: Decreased shared_buffers to 3.9GB, slightly less than SHMMAX

schemas/postgresql.conf: Optimized again using same changes as were applied to 8.4 version

schemas/postgresql.conf: Replaced with original 9.1 version

schemas/postgresql.conf: Optimized using analogous settings as postgresql.nimoy.conf

inputs/REMIB/src/nodes.make: Don't abort entire import on empty response, because an empty response is also returned for nodes that are temporarily down, not just nodes that don't exist (assumed to be after the highest numbered node). Instead, stop import after 150 nodes if user did not specify an explicit # nodes.

inputs/REMIB/src/nodes.make: Abort prefix on empty response using break, rather than just done = True, to avoid running any more code except the finally block. Moved metadata row validation outside metadata row retrieval try-except block.

inputs/REMIB/src/nodes.make: If a read times out, abort the entire node rather than just the prefix to avoid waiting 20 sec for each of 26*26 prefixes

profiling.py ItersProfiler, exc.py ExPercentTracker: Only output fraction of rows with errors if self.iter_ct > 0, to avoid divide-by-zero error

inputs/REMIB/src/nodes.make: Fixed bug where row count was output in the middle of the row processing code, instead of after the first row is processed and the row count incremented. This removes "Processed 0 row(s)" messages at the beginning of every prefix.