relax SVN archive

Fix for the determination of the global_stats flag in model_statistics().

Converted the rest of the model selection to the model_loop() design.

The following model-free methods have been converted to using the model_loop():
duplicate_data()
model_statistics()
skip_function()

Shifted to the use of the model_loop().

Created the new specific method model_desc() for returning a human readable model description.

This will be used in the model selection printouts.

Removed all references to 'run' and removed some useless comments.

Updated the ancient palmer.py sample script to the new design.

Fix for the call to the fix() user function.

Removed the state loadings which was uncovering a pickling issue.

This bug is now caught by its own system test.

Created a system test for the saving, loading, saving, and loading again of the system state.

Shifted the pipe creation from setUp() to the script to allow for stand alone execution.