relax SVN archive

Spun out the XH bond vector calculation code into its own function 'self.xh_vector()'.

Renamed all instances of 'create_tensor_pdb' to 'create_diff_tensor_pdb'.

Fixes for the script for creating the PDB representation of the diffusion tensor.

Added a sample script for the creation of the PDB representation of the diffusion tensor.

Ported r2912 from the 1.3 line.

The command used was:
svn merge -r2911:2912 svn+ssh://bugman@.../svn/relax/1.3

These changes are improvements to the model-free optimisation protocol flow diagrams.

Improvements to the model-free optimisation protocol flow diagrams.

Fixed the running of the test suite through the --test-suite command line flag.

Merged the 'test_suite' branch back into the 1.3 line.

The command used was:
svn merge -r2715:2908 svn+ssh://bugman@.../svn/relax/branches/test_suite

Intialised merge tracking on this 'test_suite' branch directory.

Ported r2856 to r2897 from the 1.3 line.

The command used was:
svn merge -r2855:2897 svn+ssh://bugman@.../svn/relax/1.3