relax SVN archive

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.

Missing module import.

The debugging flag now disables the execution locking mechanism.

The acquire() and release() calls are also recorded in the 'lock.log' file to help with lock
debugging.

Before starting final run of dauvergne_protocol, each pipe that possibly was created is destroyed.

This will help to run the full automatic model-free analysis of the GUI.