Better argument and option ordering

Arguments and options now follow a much more sensible order, following the example of other thing-to-sqlite tools. For example:

geocode-sqlite nominatum geo.db innout_test \
	--location "{full}, {city}, {state} {postcode}" \
	--delay 1 \
	--user-agent "geocode-sqlite"

The order is now:

1. geocode-sqlite
2. geocoder, such as nominatum
3. database path
4. table name
5. any additional options