relax SVN archive

Fixes for the duplicate_data() method.

The diffusion tensor object now has its sub-objects compared.

Fix for the OMP model-free optimisation system test.

The 'aic' data pipe already exists, so now it is deleted prior to model selection.

Fix for the final data pipe.

This is created by model selection, so pipe.create() doesn't need to be called.

Added a few additional comments.

Removed a useless check for models of zero length.

Fix for the model_setup() method.

The diffusion tensor was incorrectly referenced and the model, parameters, and equation were not
always being set.

Fix for the fix() user function call in the full_analysis.py script.

Fixes for the overfit_deselect() method.

The diffusion tensor object is now correctly referenced and the params variable can be None.

Removed an out of place double quote.

Docstring fix in the base API write_pdb() method for epydoc.