relax SVN archive

Bug fix for the n_state_model user functions.

The class instance now ends in '_obj'.

Bug fix for the unit test of the N-state model assemble_param_vector() method.

The numpy array could not be directly compared so each element is checked individually.

Bug fix for the N-state model assemble_param_vector() method.

The second last probability was missing from the parameter vector.

Created a unit test for the N-state model assemble_param_vector() method.

Bug fix for the N-state model assemble_param_vector() method.

The sim_index arg is now a keyword arg which defaults to None. This arg is not required.

Renamed the class instance n_state_model to n_state_model_obj to avoid a name clash with the module.

Completed the assemble_param_vector() method.

Created a base class method num_instances() to check the sequence and return the number of spins.

The J(w) mapping and relaxation curve fitting num_instances() methods have been removed.

Introduced the new instantiated consistency tests class in prompt.consistency_tests.

Removed a trailing whitespace.