Updated central host location.

Yay! It is not always on and the address looks stupid. And it has no https,
Hooray!!  (Also I cleaned up the source a bit.)
Removed 'call' and 'list' from script/google.maps.js.
Removed mandatory provision of req.query.options in _list/bbox-filter.

Otherwise I have to go through lengths to write '?options=' +
encodeURLComponent(JSON.stringify({})) or something.
Changed arguments to scipt/google.maps/create_options.

It looks more transparent to let this function expand a single 'options'
object. I decided to introduce a general 'coordinates' member to be removed
from options and attached as path/paths/position after conversion to LatLngs.