relax SVN archive

Created, by 'svn cp', the mf_csa module.

Copyright updates.

Fixes for create_vector_dist() for the new structural data design.

The atoms are added to the single molecule, and the struct_index has been eliminated.

Fix for the Internal.add_molecule() method.

The orig_mol_num structure must be a list!

Docstring fix for pack_structs().

Fix for create_vector_dist().

The presence of structures now is tested using cdp.structure.num_models().

Modified load_spins() to handle spin systems with the molecule unnamed.

If loading spins from a PDB file is used but the sequence already loaded (without the molecule ID
string), the molecule ID is now set instead of a new molecule container created.

Fix for a RelaxError print out.

Updated all the files in maths_fns/ to the 1.2.10 branched ellipsoidal CS tensor code.

This code comes from Pavel Kaderavek <kada att chemi dot muni dot cz> and is located at
https://www.ncbr.chemi.muni.cz/~kada/relax-1.2.10_cst.tar.

The 'mf_csa.py' file has been excluded for now.

Added all the files, by 'svn cp', needed for the 1.2.10 branched ellipsoidal CS tensor code.

This is guessing the origin of files in https://www.ncbr.chemi.muni.cz/~kada/relax-1.2.10_cst.tar.
This maths_fns/ code comes from Pavel Kaderavek <kada att chemi dot muni dot cz>.