relax SVN archive

Modifying the function test 'test_read_xyz_internal1()'.

This is Han's patch https://gna.org/task/download.php?file_id=13147 attached to the task
http://gna.org/task/?7404.

In the 'test_read_xyz_internal1()' option parser='internal' has been removed.

Shifted the model-free window build_main_box() method to the base class.

Split the auto model-free build_main_box() method into two.

The left hand box is now created by build_left_box(), to reflect the design of build_right_box()
and to allow build_main_box() to be abstracted into a base class method for all analysis frames to
use.

The auto model-free analysis frame now uses the base setup_analysis_element() method.

Created the setup_analysis_element() base method for laying out the main analysis GUI element.

This currently adds a border of 10 px around each analysis.

Added some horizontal spacing between the elements of the text selection GUI element.

Big simplification by shifting the widths of the text selection GUI element to hard coded variables.

These hard coded class variables are located in the base class.

Modifying the function test 'test_read_xyz_internal1()'.

This is Han's patch https://gna.org/task/download.php?file_id=13144 attached to the task
http://gna.org/task/?7404.

The function 'test_read_xyz_internal1()' was modified so that it is more specific to the XYZ file
added to relax and for the new XYZ reader.

A spacer is now used for add_text_sel_element() if no button is present to fill the button space.

The model-free, Rx, and NOE frame main box sizers all expand horizontally now.