Optionally quiet down the output abit

Change ::line's to ::log so that I can use --quiet to shut that thing
the hell up
Add time measuring

Add time measurement and suspend cache invalidation during the import to
shave off a few seconds
Disable autocommit

Turn off autocommit during the import. Cuts off ~10 seconds in testing.
Use an indexed select

Post_title is not indexed, but post_name is. Although the index in this
case doesn't help a lot, it helps enough, to the tune of cutting down
another ~12-14 seconds.