relax SVN archive

Clean up of the entire NOE API.

Removed duplicated epydoc tags.

Docstring and default arg changes.

Alphabetical ordering of methods, and separation of the private from the API methods.

Fixes for the relaxation curve fitting API.

The fixes are for the return_data_name(), return_grace_string(), and return_units() methods.

Docstring update to return_grace_string().

Clean up of the create_mc_data() API method across the board.

The spin_id keyword is now accepted by all, and is a keyword.

Converted the _select_model() method to be private, removing it from the API.

Converted a number of methods to being private, removing them from the API.

These include:
_grid_search_setup()
_linear_constraints()
_model_setup()
_relax_time()
_select_model()

A large number of method and documentation variables to the specific analysis API.

These include:
default_value_doc
default_value()
grid_search()
minimise()
return_data_name_doc
return_data_name()
return_grace_string()
return_units()
set_doc
sim_pack_data()