relax SVN archive

Adding code for extracting the vector in the system test test_read_xyz_internal2()

Code for extracting a vector of two given atoms was added in the system test test_read_xyz_internal2().

The data arg to the execute_thread() method is now a proper tuple when running as a thread.

Rearranged the data checks in the NOE page to match the page layout.

The NOE page now uses the missing_data GUI dialog for missing data.

The assemble_data() method is now called outside of the thread, and the data is passed in.

The NMR frequency is now checked in the NOE page prior to execution.

This will prevent strange missing results file errors.

Fix for unresolved residues when blank in the NOE page.

The value is now converted to None.

Adding code for checking the atomic positions in the system test test_read_xyz_internal2()

Code for checking the atomic position (x, y and z) of the last spin was added in the system test test_read_xyz_internal2().

str_to_gui() and gui_to_str() is now being used everywhere in the NOE page.

The NOE analysis sync_ds() method now uses str_to_gui() and gui_to_str().

Fix for the NOE ref and sat GUI elements - the directory for the file selection dialog is now correct.

Previously the directory was the full path of the file, so it failed.