relax SVN archive

The LaTeX bibliography style for PhD theses now includes the DOI hyperlink.

This is for the user manual.

Slight modification of the DOI hyperlink formatting bibliography style for the user manual.

Modified the relax LaTeX bibliography style file relax.bst to convert DOI numbers to hyperlinks.

This is to add links to the references within the relax user manual.

Created the new 'Citations' chapter of the relax user manual.

This is to clearly outline to the user the citations required for the various components of relax.

Added the Fushman 1999 reference and a few formatting fixes in other references.

Added the Sun et al., 2011 and Erdelyi et al., 2011 references to http://www.nmr-relax.com.

The citations have been added to http://www.nmr-relax.com/refs.html and the references to
http://www.nmr-relax.com/features.html.

Improvements to the 'Supported NMR theories' section of the user manual introduction.

This includes the addition of the Morin and Gagne 2009 reference!!!

Added the Morin and Gagne 2009 reference for the consistency testing.

Added some more abbreviations to the relax user manual.

Created a new chapter for the relax user manual titled 'The relax data model'.