relax SVN archive

Updated the dispersion software comparison table for the optimisation in GUARDD.

I have added the 'MATLAB interior-point black magic' algorithm as MATLAB is not kind enough to
explain what algorithm it is really using.

Small LaTeX layout changes to the dispersion chapter file.

Fix for the figure labelling in the dispersion chapter of the manual.

Updated the TODO section of the dispersion chapter of the manual for the newly listed models.

Improvements for the supported dispersion model table in the manual.

Footnotes have been added to indicate which models are not implemented yet.

Rearranged the sections of the dispersion chapter of the manual.

Removed a typo from the dispersion model table.

Expanded the numeric dispersion models to include the linear and branched 3-site models in the manual.

Fixes for a number of page numbers in the bibtex file for the user manual.

Added the Korzhnev et al., 2005 reference to the bibliography file for the manual.