relax SVN archive

Add structural object load_pdb() methods now take the read_mol, set_mol_name, read_model, set_model_num args.

Fixes for 3 model-free unit tests using generic_fns.structure.main.read_pdb().

Passed the new args into generic_fns.structure.main.read_pdb().

Redesigned the structure.read_pdb() arguments and docstring.

Fixes for 4 of the structure.read_pdb() user function arg unit tests.

Removed the model arg unit test of structure.read_pdb() and added 4 new tests.

Created the new RelaxNoneStrListStrError error class and fixed the RelaxNoneStrListError print out.

Initialized merge tracking via "svnmerge" with revisions "1-8214" from
svn+ssh://bugman@.../svn/relax/1.3

Created a branch for the development of the ellipsoidal CS tensor.

This development will be done by Pavel Kaderavek (kada att chemi dot muni dot cz) and Petr Novak
(email address currently unknown). This branch is discussed in the threads starting at
https://mail.gna.org/public/relax-devel/2008-12/msg00046.html (Message-id:
<494272D5.2060909@...>) and https://mail.gna.org/public/relax-devel/2008-12/msg00045.html
(Message-id: <49426B50.4040908@...>).

Redesign of the args for the structure.read_pdb() user function.