relax SVN archive

Updated the API documentation at http://www.nmr-relax.com/api/ to version 2.2.0.

Updated the HTML version of the user manual at http://www.nmr-relax.com/manual/ to version 2.2.0.

Added the relax 2.2.0 manual to the repository.

Updated the version variable to 2.2.0.

Merged the relax version 2.2.0 CHANGES file back to trunk.

The command used was:
svn merge -r18312:18313 svn+ssh://bugman@.../svn/relax/tags/2.2.0 .

Updated the CHANGES file for relax version 2.2.0.

Trailing whitespace removal in the CHANGES document.

Changed the minor version number as this is a major feature release.

relax version 2.1.3.

This is a major bugfix release which marks the completion of the N-state model analysis code. The
N-state model allows single static structures or ensembles of static structures to be analysed and
compared using residual dipolar couplings (RDCs), pseudo-contact shifts (PCSs), distance restraints
via NOEs. In addition to alignment tensors, the populations or probabilities of each state can be
optimised as well as the position of the paramagnetic centre when PCSs are used.

The N_state_model.test_populations system test has been made less stringent to allow MS Windows to pass.