relax SVN archive

Passed the number of params into the assemble_scaling_matrix() method.

Converted the num_params keyword arg in assemble_scaling_matrix() to a normal arg.

Updated the model-free assemble_scaling_matrix() method to the new relax design.

Changed all epydoc '@param' to '@keyword' for all keyword args in the mf_minimise module.

Updated the model-free assemble_param_vector() to accept spin containers.

The model-free grid search args are now passed into the minimise() method.

These will later be passed into the grid search configuration functions.

Split up the grid search function, reverting back to the structure as in the 1.2 line.

Shifted all the setting up of data for model-free minimisation into its own function.

Shifted the grid search limits, diagonal scaling, and grid size test into new separate methods.

Whoops, removal of the old code which was shifted into a new function in r5170.