relax SVN archive

Fixed some name classes in the namespace of pipe_control.structure.mass.

Shifted the cone geometric object representation functions to lib.structure.represent.cone.

The structure.create_cone_pdb user function first calls pipe_control.structure.main.create_cone_pdb()
which then calls lib.structure.represent.cone.cone(). This allows the pipe_control function to
write out the file and add it to the data pipe's results file list.

Removed the unit test of the parser argument of the structure.read_pdb user function.

The argument no longer exists.

Updated the lib package __all__ list.

Removed the no longer used parser argument for reading PDB files from some unit tests.

The lib.selection.parse_token() function is using the new Python way of splitting strings.

This is via the string's split() method.

Shifted parse_token() and tokenise() from pipe_control.mol_res_spin to lib.selection.

The pipe_control.mol_res_spin functions no longer use the selection object __contains__() method.

All functions now use the contains_*() methods of the lib.selection.Selection object.

Shifted the selection object out of pipe_control.mol_res_spin and into tne new lib.selection module.

The dependence on the MoleculeContainer, ResidueContainer and SpinContainer objects have been
removed, as this is part of the relax data store. Therefore all of the private methods
(__contains__, __contains_mol_res_spin_containers, and __contains_spin_id) have been deleted. The
contains_*() will need to be used instead.

Shifted the pipe_control.structure.internal module to lib.structure.internal.object.

This is the new location of the internal structural object.