relax SVN archive

Fix for the Mf.test_read_results_1_2 system test - the spin.nucleus structure no longer exists.

This data structure has been eliminated as it is an ancient remnant which is no longer used anywhere
within relax.

Updated the OMP model-free results file in the test suite shared data for the recent changes.

The ordering of model-free parameters is slightly different now.

The 'select' global param can have a corresponding MC simulation structure.

The specific API data_names() method now accepts the 'scope' argument.

This is used to differentiate global verses spin parameters.

Lots of improvements for the specification of the model-free global and spin parameters.

The specific API param list base_loop() and loop() methods now match against the parameter scope.

This allows for the differentiation of global from spin parameters.

Improvements and fixes for the minimisation parameters in the specific API param list object.

The specific API param list get_desc() method now skips the error and sim structures.

Removed a number of specific API methods from the model-free analysis.

These are now provided by the base class.

Large reworking of the specific analysis API.

Many specific methods relating to parameters have been shifted into the API base class. These
include:
- data_names(),
- data_type(),
- default_value(),
- return_conversion_factor(),
- return_data_desc(),
- return_data_name(),
- return_grace_string(),
- return_units().

These are now essentially provided by the parameter list object.

All of the global and spin parameter lists have now also been merged into the single 'self.PARAMS'
structure.