relax SVN archive

Updated the API documentation page to say that the 1.2 documentation corresponds to version 1.2.9.

WORK IN PROGRESS: updates to use correct search paths and work when
starting from any unit test directory

note some documentation maybe inaccurate or incomplete

Updated the test suite to call 'reset()' rather than its old name of 'init_data()'.

Updated all the sample scripts to use the new PDB reading user function name 'structure.read_pdb()'.

Renaming of the user function 'init_data()' to 'reset()'.

For more details see https://mail.gna.org/public/relax-devel/2006-11/msg00145.html (Message-id:
<7f080ed10611102042q55068c56l42aa691764f18d66@...>).

Updated the '__init__.py' files for the 'pdb' to 'structure' rename.

Because of the previous commit (renaming 'pdb' to 'structure'), much code needed updating.

All calls to the functions of 'self.relax.generic.pdb' were replaced with the equivalent function in
'self.relax.generic.structure'. For example all calls to 'self.relax.generic.pdb.read()' are now
'self.relax.generic.structure.read_pdb'.

All instances of 'self.relax.interpreter._PDB' in the test suite were replaced with
'self.relax.interpreter._Structure'.

Renamed the 'pdb' user function class to 'structure'.

For full details, see the post at https://mail.gna.org/public/relax-devel/2006-11/msg00081.html
(Message-id: <7f080ed10611062354i6c4c8601y825585c2c021b9ab@...>).

Merged the 'tensor_pdb' branch back into the 1.3 line.

The command used was:
svn merge -r2664:2846 svn+ssh://bugman@.../svn/relax/branches/tensor_pdb

This branch arose from the discussions starting with post located at
https://mail.gna.org/public/relax-devel/2006-10/msg00136.html (Message-id:
<7f080ed10610252045r3dcbba38q58aa53142af96e5a@...>).

Ported r2844 from the 1.3 line.

The command used was:
svn merge -r2843:2844 svn+ssh://bugman@.../svn/relax/1.3

This adds the Eufrak to the model-free optimisation protocol diagrams of the manual in prepartation
for merging of the branch back into the 1.3 line.