Using GWT SuperDevMode is the recommended way for development.

For an introduction see:

http://www.gwtproject.org/articles/superdevmode.html
http://www.badlogicgames.com/wordpress/?p=3073

Preparation:
- Change build.xml <property name="gwt.location" value="/home/src/gwt-2.5.1" /> to the appropriate location.
  Then run 'ant extract-jars'

- To serve tiles and the html project from the same origin one can use this apache2 configuration:
	ProxyPass /tiles/ http://city.informatik.uni-bremen.de/tiles/vtm/
    ProxyPassReverse /tiles/ http://city.informatik.uni-bremen.de/tiles/vtm/

- Create a link to the project by 'ln -s /path/to/vtm/vtm-gdx-html/war ~/public_html/vtm' 
  to make it available via http://localhost/~my_user/vtm
  
Running:  
- The codeserver can be executed with 'ant VTMSuperDevMode'