Fixed a NPE.
For when using postgres!
Changed to call System.exit(0) when done since program wasn't
terminating when using PostGRES.
Fixed comment and changed config so that config is auto reloaded every
30 secs.
Changes so that works with PostGRES. Was having problems with temporal
columns since was specifying to always then use datetime(3). But that is
just a MySQL thing. So changed SchemaGenerator so that temporal columns
are treated specially for MySQL but for PostGRES the usual timestamp
type is used.