relax SVN archive

Fix for the reading of relax 1.2 model-free results files for the diffusion tensor structure redesign.

Another fix for the fold_angles() diffusion tensor function - again an incomplete design conversion.

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.