relax SVN archive

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.

Bug fix for the params arg of the model_free.create_model() user function.

This arg is now properly checked.

Bug fixes for the model-free user function arg unit tests.

Some args had to be supplied in the unit tests to prevent RelaxErrors from reaching the correct arg.

Bug fix for the model arg of the model_free.select_model() user function.

The testing of this arg started with and elif statement!!!