relax SVN archive

The HTML user manual for the 1.2 stable version has been shifted to http://nmr-relax.com/manual/1.2
and HTML user manual for the unstable 1.3 development line can be found at
http://nmr-relax.com/manual/1.3. The documentation webpage (http://nmr-relax.com/docs.html) has
been updated to include links to and Google searches for both versions of the PDF and HTML manuals.