Regenerate OID table and make it public

Also document how the table is generated.  This has been generated
from a build of PostgreSQL 9.2.3.

Previously, Oids above 10000 were included, but these are not
guaranteed to remain stable between releases and don't seem very
useful besides, so they are now omitted.

Signed-off-by: Daniel Farina <daniel@fdr.io>