relax SVN archive

Added the Morin et al., 2014 relaxation dispersion analysis in relax citation to the website.

The paper is referenced on the pages http://www.nmr-relax.com/features.html and
http://www.nmr-relax.com/analyses/relaxation_dispersion.html, and the citation itself on the page
http://www.nmr-relax.com/refs.html.

All of the add*() methods of the parameter list object have been made private.

This is to prepare the object to be accessible to the rest of relax, so that it can be decoupled
from the specific API object.

Updated the relaxation dispersion citation for relax as this is now officially published.

Renamed many of the specific analysis parameter list object methods to match the API names.

This is to prepare for a decoupling of the parameter list object from the API object.

Shifted the core of the data_names() specific analysis API method into the parameter list object.

Fix for one of the value.set user function unit tests.

The 'alpha2' N-state model parameter no longer exists, and the '2' is now supplied as index=2.

The new index argument for the value.set user function now defaults to zero.

This is for backwards compatibility as the default value of None was not handled by the user
function backend.

Clean up of the N-state model user function docstrings.

The pseudo-parameter names such as 'p0', 'p1', etc. no longer exist.

Converted all of the N-state model parameters to use the parameter list object.

The default_value(), return_data_name() and return_grace_string() API methods have also been deleted
as these have been superseded by the parameter list object.

Converted the remaining N-state model system tests to use the new value.set index argument.