relax SVN archive

Created the Structure.test_rmsd_spins system test for checking the per-atom RMSD calculation.

This is for the new option in the structure.rmsd user function.

Addition of the atomic boolean argument to the structure.rmsd user function front end.

This will be used to enable the calculation of per-atom RMSDs.

Small edits for the CHANGES file.

Updated the relax version number to 4.0.2 on the http://www.nmr-relax.com/api/index.html webpage.

Updated the relax API documentation at http://www.nmr-relax.com/api/4.0/ to version 4.0.2.

Added some more user function renaming redirects.

Updated the relax HTML manual at http://www.nmr-relax.com/manual/index.html to version 4.0.2.

Updated the http://www.nmr-relax.com/download.html webpage for the relax 4.0.2 release.

Backported the relax 4.0.2 CHANGES file changes to trunk.

The command used was:
svn merge -r28211:28212 svn+ssh://bugman@.../svn/relax/tags/4.0.2 .

Updated the CHANGES file for relax 4.0.2.