relax SVN archive

The panels inside the wizard can now expand to the full size.

Generating two new functions '__parse_xyz_record()' and 'fill_object_from_xyz()'.

This is Han's patchhttps://gna.org/task/download.php?file_id=13252 attached to the task
http://gna.org/task/?7404.

Two new functions '__parse_xyz_record()' and 'fill_object_from_xyz()' were generated in the class
'MolContainer()' in the file 'generic_fns/structure/internal.py'.

Debugging and cleaning up the user functions load_xyz() and __parse_models_xyz().

This is Han's patch https://gna.org/task/download.php?file_id=13251 attached to the task
http://gna.org/task/?7404.

Debugging and several print outs in the user functions load_xyz() and __parse_models_xyz() in
generic_fns/structures/internal.py have been removed.

Shifted the add_buttons() method from the panel to the wizard.

A number of fixes for the wizard.

Changing the name of the user function __parse_models() to __parse_models_pdb()

This is Han's patch https://gna.org/task/download.php?file_id=13250 attached to the task
http://gna.org/task/?7404.

The name of the user function __parse_models() in 'generic_fns/structure/internal.py' has been
changed to __parse_models_pdb(). This function is specific for reading the pdb files.

Generalized the code for selecting the parameters for the different exponentials.

Corrected the header.

Modified the specific function 'relax_fit.select_model()' to handle two of the new exponential names.

The 'exp' function now is named 'exp_2param_neg' and the 'inv' function, 'exp_3param_inv_neg'.

Modified the function 'relax_fit.select_model()' to handle the new exponential names.