relax SVN archive

Created an object called Relax_lock to help debug locking issues in relax.

The status.spin_lock lock is now using Relax_lock.

Alphabetical arrangement of the classes in the status module.

All of the generic_fns.mol_res_spin fns which modify the data structure are now using the new lock.

Created the status.reset() method to resetting the status object.

This will be used in the test suite.

Created a lock object for the molecule, residue and spin data structures.

This will be used to prevent races when spin data is being accessed and changed at the same time.
This affects the spin viewer window which is very sensitive to races.

The relax controller window is calling Layout() after updating to show all panels properly.

This is needed when showing the model-free or Rx panels.

Clean up of the showing and hiding of spin viewer window.

All observers and registered now in the Show() method and unregistered in handler_close().

The pipe editor and spin viewer thread safe update calls are now followed by wx.Yield().

This causes all events to be flushed prior to the method exiting.

Fixes for the GUI tests due to the change in the relax execute button.

The spin system analysis GUI element is now disabled again - the structure had changed names.