relax SVN archive

Added all of the frame order test data 'back_calc.bz2' state files as these are quite small.

Added some missing files to the API documentation.

Updated the download page (http://www.nmr-relax.com/download.html) for more of the distributions.

Small syntax fix in the release checklist document.

The relax HTML user manual footer has been modified to remove the name of the person who compiled it.

This is for http://www.nmr-relax.com/manual/index.html, and now contains links for relax
(http://www.nmr-relax.com), the manual (http://www.nmr-relax.com/manual) and the PDF version of the
manual (http://download.gna.org/relax/manual/relax.pdf).

Updated the HTML version of the user manual to relax version 2.1.2.

This is for http://www.nmr-relax.com/manual/index.html.

Another attempt at fixing the scons failure in MS Windows due to scipy and ctypes killing each other.

Scons fix for MS Windows.

A bug was introduced back at r17786 which causes scons to fail on MS Windows. This has to do with
the ctypes.Structure object but strangely led to a AttributeError importing scipy when initialising
scons.

Updated the API documentation to relax version 2.1.2.

Started to update the download webpage for relax 2.1.2 (http://www.nmr-relax.com/download.html).