relax SVN archive

Eliminated the __set_properties() and __do_layout() methods.

The code has been shifted into __init__() and some variables shifted to hardcoded class variables.

Added a simple XYZ structure file for the test suite.

This was attached to task #7404 (https://gna.org/task/?7404) by Han. The directory for the file was
given at https://mail.gna.org/public/relax-devel/2011-06/msg00083.html.

With debugging turned on, the size of the GUI main frame can be changed.

Large simplification of the model-free frame code by the use of the add_text_sel_element() base method.

The Rx peak list grid GUI element now also uses the add_text_sel_element() base method.

Large simplification of the Rx frame code by the use of the add_text_sel_element() base method.

Large simplification of the NOE frame code by the use of the add_text_sel_element() base method.

Added the add_text_sel_element() base class method for creating one of the basic frame elements.

This element consists of text, a text control, and an optional button.

Regularised all of the auto NOE analysis frame buttons.

Added the add_button_open() base class method for regularising the buttons across frames.