relax SVN archive

Converted the select_model() model-free method to the new relax design.

Fixes for all the unit tests of the generic_fns.value.partition_params() function.

Added the missing import of the spin_loop.

The model 'm4' construction system test now passes.

Updated the docstring of the model_setup() model-free method to be in epydoc format.

Converted the data_init() model-free method to the new relax design.

Converted the model_setup() model-free method to the new relax design.

Converted the create_model() model-free method to the new relax design.

Imported the specific_fns.model_free_obj object.

Renamed all the instantiated classes in specific_fns.__init__.

This is to avoid name clashes and the overwriting of the module names.

Removed the Model_free_main.__init__() method and converted its docstring to that of the class.