relax SVN archive

More fixes for the minfx and bmrblib instructions for the release checklist.

These are the packages bundled with relax (http://gna.org/projects/minfx/ and
http://gna.org/projects/bmrblib/).

Added the correct relax manual to the repository this time.

Updated the release checklist document to include the correct instructions for minfx and bmrblib.

Reverted r18774 - the update to version 2.2.3 in the wrong place!

The command used was:
svn merge -r18774:r18773 .

Updated the version number to 2.2.3 - the previous update was to the main line!

Added the relax 2.2.3 PDF manual to the repository.

Fix for a <br> tag in http://www.nmr-relax.com/links.html.

Updated the version number to 2.2.3.

Ported the relax 2.2.3 CHANGES file changes back to trunk.

The command used was:
svn merge -r18771:18772 svn+ssh://bugman@.../svn/relax/tags/2.2.3 .

Updated the CHANGES file for version 2.2.3.