relax SVN archive

Shifted all the copy functions into generic_fns.mol_res_spin.

Renamed all the functions of the residue, molecule, and spin modules.

This is in preparation for merging into the generic_fns.mol_res_spin module.

Wrote a module docstring.

Split up of the generic_fns.selection module.

All of the methods relating to the molecules, residues, and spins (including the spin selection
string and associated functions and the spin selection object) have been shifted into the
generic_fns.mol_res_spin module. The functions remaining in generic_fns.selection are related to
purely the selection and deselection of spins.

Added automatic indexing for the model selection techniques.

Fixed the indexing in the fetch_docstrings.py script.

Indexing fixes.

A few more updates to the development chapter for the new design.

Updated the development chapter to the new relax design.

Removed a LaTeX file which was split into separate chapters long ago.