relax SVN archive

Destroyed assign_func() and shifted all the data storage back to generic_fns.spectrum.read().

The peak list type is now automatically determined.

The new autodetect_format() function was written, and the top half of the read() function was
modified to handle the auto-detection.

Fixed the args and docstring for the generic_fns.spectrum.read() function.

Updated the relax_fit.py sample script to match the changes of r7954 to the system test script.

The script now uses the new spectrum user function class.

Expanded the relax_fit.py system test script to include the creation of a number of files.

These include files of Rx values, the results file, grace files, and the saved state file.

Updated the relax_fit.py system test script for the new spectrum user function class.

Fix for the initial spectrum.read_intensities() print out, the int_method arg was not being shown.

Fix for bug #12487 (https://gna.org/bugs/index.php?12487).

This bug was reported by Tyler Reddy (TREDDY at dal dot ca).

The problem was that missing XH bond vector data was being manifested as the spin.xh_vect object
being set to None. The overfit_deselect() function which is responsible for deselecting unsuitable
spins prior to optimisation was only checking if the object existed, not if it was None!

Created a new noe user function class, unrelated to the previously deleted one.

This contains the single user function, noe.spectrum_type().

Added module docstrings and __docformat__ variables to the 'spectrum' prompt module.