relax SVN archive

Replaced the sequence file, PDB file, and unresolved spin GUI elements in the NOE page with a spin editor.

Fix for the assemble_data() Rx analysis page method for when no data is present.

Fix for the Analysis_controller.current_analysis_name() method - the name and not page is now returned.

Fix for the R1 analysis GUI test - the peak list paths were missing the extensions.

Fix for the filename variable in the Rx analyses GUI pages.

The execution lock is only unlocked if it was locked in the first place.

The exception printing now occurs in the GUI thread level.

The execution lock is now released if an error is thrown in the thread.

Shifted the GUI test check_exceptions() method into a base class for all tests to use.

The GUI tests are now checking if exceptions have occurred in the threads.