switch to API 0.6

The SVN-version is switched to use OpenStreetMap API 0.6 now.
It can still load API 0.5 xml-files.
This is a major step to the planned Version 1.0
of Traveling Salesman to be released on 2009-03-23.
Consequences:
* your local map needs to be re-imported.
There is no support to load use old osmbin or
xml-FileTile maps that do not contain the new
version-feature.
* downloading maps may not work until the API 0.6
is public on 03.23.2009 .