relax SVN archive

Removed the dead cia.vc links from http://www.nmr-relax.com/links.html.

The http://archive.is/www.nmr-relax.com section is now in the top menu.

Added the http://archive.is/www.nmr-relax.com webpage archives to http://www.nmr-relax.com/links.html.

Removed the relax 2.1.0 and 2.2.0 distribution archives from the Gna! download infrastructure.

Updated the forum links for the 2.2.2 relax release.

The new item is located at https://gna.org/forum/forum.php?forum_id=2377.

Fix for the http://www.nmr-relax.com/features.html webpage - an unescaped ampersand was used.

This was found by the w3c validator via:
http://validator.w3.org/check?uri=http://www.nmr-relax.com/features.html.

Removed a pile of dead pages from the API documentation http://www.nmr-relax.com/api.

Updated the API documentation at http://www.nmr-relax.com/api/ for relax version 2.2.2.

Added a missing </div> ending tag to the http://www.nmr-relax.com/download.html webpage.

Attempt at fixing the CSS IDs in the http://www.nmr-relax.com/download.html webpage.

Updated the relax HTML user manual at http://www.nmr-relax.com/manual for relax version 2.2.2.