relax SVN archive

Simplification of the return_value() function.

The model-free code no longer calls the deleted relax_data.data_init() function.

Updated the relax_data.read() back end for the new ID string based design.

The update_data_structures_pipe() and data_init() functions have been deleted and the pack_data()
function highly modified.

Modified the value.set() user function GUI element so that the parameter element is an input field.

Redesigned the relax_data.read() user function front end for handling data ID strings.

Initialized merge tracking via "svnmerge" with revisions "1-12644" from
svn+ssh://bugman@.../svn/relax/1.3

Creating a branch for redesigning how relaxation data is handled in the model-free data pipes.

This change is related to the task #6397 (https://gna.org/task/?6397)

kada _at_ chemi _dot_ muni _dot_ cz

https://mail.gna.org/public/relax-devel/2011-03/msg00001.html
https://gna.org/task/download.php?file_id=12603

This patch includes change in the functions calc_(d,d2)noe in a file maths_fns/ri.py, where
(d,d2)ri_prime was renamed to (d,d2)ri. This patch covers also the related change of names in the
function init_res_r1_data (class Mf, maths_fns/mf.py), where the variables are initialized.

Created an initial value.set() user function GUI element and menu entry.

The value wizard graphic is again the wrong size!!!