relax SVN archive

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.

Docstring consistency in the internal structural object.

Spacing fixes in the internal structural object.

Import fixes for the lib.structure.internal.displacements module.

Moved the residual pipe_control.structure.api_base module to lib.structure.internal.displacements.

This is because the base module still contained the Displacements class.

Updated the package __all__ list for some unit tests.

Deleted the unit tests of the structural API base class.