relax SVN archive

The 'scons clean' target now removes temporary relax save files.

Fixes for the system tests - the data is now in dictionaries.

Fixed issue with incomplete data as for NOE calculation (see http://svn.gna.org/viewcvs/relax?rev=11845&view=rev
).

If data is missing, error is not displayed in wx.MessageBox, as it crashes teh GUI, but is listed in controller.

This bug was detected by Edward d'Auvergne (http://gna.org/bugs/?17319).

Better locking support for nested scripts.

The execution lock directly handles the locking of the nesting of scripts.

Nested scripts no longer acquire the execution lock.

The execution lock mechanism no longer blocks scripts from running within scripts.

The unit/system test name is being placed into the locking log when debugging.

The system and unit tests are placing their names into the status object.

This will be used for debugging.

Shifted the initialisation of the status object to be after the __main__.debug initialisation.