Changed iframe height to avoid vertial scroll bar (Chrome).

There are certainly more complicated ways to remove the scroll bar or hide it
or set the iframe to the actual height of its content. On the other hand are we
only talking about 3-4 pixels of screen space FOR CHRIST SAKE.
Some clean-up of map.html (yes this counts!!).
Removed jquery.couch from map.html.

$.couch.db().list has way too many wrappers and occludes settings.complete.
Staged row depletion only if 'keys' are posted.

This way _list/bbox-filter runs faster if no keys are given. Maybe I can split
the query into the finite sorted half and an infinite unsorted one. In this
case the client would have to do some sorting which is VERY VERY UNFAVORABLE!!!