relax SVN archive

The cancel button now destroys the wizard dialog and is not a panel method any more.

There is still a bug causing segfaults when the dialog is destroyed!

Too many empty lines.

The back and next buttons are now partially functional.

The icons are displayed and the go_back() and go_next() methods are executed. But there are still
bugs and the page layout is incorrect.

Added the next navigation icons to the paths module.

Added 22x22 Oxygen icons for the back and next wizard buttons.

The buttons are now added to the wizards.

The add_button() method has been converted to build_buttons() and is executed at the start of the
run() wizard method.

changing the description in the user functions load_spins() and read_xyz().

An example for loading the spins for xyz file format was added in the description of the user function load_spins() and the description of the user function read_xyz() was changed. Both user functions are located in 'prompt/structure.py'.

Debugging the user functions load_xyz() and test_read_xyz_internal2().

The user functions load_xyz() in 'generic_fns/structure/internal.py' and test_read_xyz_internal2() in 'test_suite/system_tests/structure.py' have been changed so that the molecule name can be read properly.

Modified the function for checking the inversion-recovery curve fitting results.

The function was still looking for 'exp_2param_neg' fitting...

Renamed the function for checking the curve fitting results.