relax SVN archive

Fix for bug #20182 (https://gna.org/bugs/?20182) - the sequence element window ordering issue.

The sequence element window now has the parent wx.Window element set. This prevents the main relax
window from being set as the parent and hence coming to the front after the sequence element window
is launched from a user function window.

Improvements to the descriptions of the structure.read_xyz user function arguments.

Improvements to the descriptions of the structure.read_pdb user function arguments.

Fix for bug #20181 - the GUI sequence editor window TypeError problem.

This is the fix for the bug reported at https://gna.org/bugs/?20181.

Updated the model-free GUI auto-analysis buttons for multiple spin name types.

The @H and @N names in the wizards behind the 'Dipolar relaxation', 'X isotope', and 'H isotope'
buttons have been changed to @H* and @N* to support Trp NE1-HE1 atom pairs.

Added @HE1 to the spin ID list of the structure.load_spins user function.

This is only seen in the GUI.

Window ordering bug fix for the user function windows launched from the spin viewer window.

The spin viewer window no longer hides behind the main relax window after the launch of the user
function.

Created the new generic_fns.result_files for standardising the handling of results files.

This fixes the bug where results files are repetitively added to the list. All of the code touching
cdp.result_files now uses this module instead.

Bug fix for the repetition of Monte Carlo simulations in the relaxation curve-fitting analyses.

This is in the specific analysis API, so will allow all analysis types to repeat Monte Carlo
simulations for error analysis.

Updated the scripting section of the intro chapter of the user manual for non-technical users.

See http://www.mail-archive.com/relax-users@.../msg01253.html and bug #20174
(http://gna.org/bugs/?20174).