relax SVN archive

Added a missing import.

Fixes for the interface of the map() user function.

More fixes for the system tests of the OpenDX mapping of model-free spaces.

Fixes for the system tests of the OpenDX mapping of model-free spaces.

Converted the map() user function interface to the new relax design.

Converted the map() and run() functions to the new relax design.

Renamed the opendx.opendx module to opendx.main.

Converted the class methods into module functions.

Renamed the dx module to opendx to avoid name clashes.

Fixed the call to the OpenDX run() method.