relax SVN archive

Fix for the setting of the diffusion tensor parameter errors in the model-free specific analysis code.

Fix for the setup of the model-free Monte Carlo simulations for the new diffusion tensor design.

Another fix for the diffusion_tensor.init user function - it was not completely converted.

Fix for the fixing of parameters in the model-free analyses.

The diffusion tensor set_fixed() method is now used.

Fix for the XML output of the diffusion tensor - only the modifiable parameters are output.

This was the previous behaviour and is needed for the test suite to pass.

Converted the palmer.extract user function to use the new diffusion tensor design.

The diffusion tensor bmrb_read() function now uses the set_fixed() method instead of fixed().

The fix user function now uses the diffusion tensor set_fixed() method.

Renamed the diffusion tensor fixed() method to set_fixed() to avoid clashing with the 'fixed' object.

Fix for the model-free specific analysis duplicate_data() method for the new design.

The diffusion tensor __mod_attr__ object is now called _mod_attr.