relax SVN archive

Created the set_param_values() API method for model-free analysis.

Created the set_param_values() API method for the N-state model.

Analysis API fixes.

The param_names() and param_values() methods are now called get_param_names() and
get_param_values().

Modified the analysis API common method _set_param_values_spin() to accepts lists as args.

The base analysis API set_param_values() arguments have been changed.

The param and value args now must be lists. Only the docstring has been modified.

Added a unit test test_set_n_state_model_rx() for checking value.set() with the N-state model.

Created the arg_check.is_list() function.

Fix for the generic_fns.value.set() method.

The return_data_name() specific API method should have been used to send the correct string into
default_value().

Created the common API method _set_param_values_spin().

A number of modules are now using this method.

Added the api_common module to the __all__ list.