relax SVN archive

Improvements to the pymol.view and molmol.view user functions for finding the PDB files.

Now the possibility that this is being run from a results subdirectory is taken into consideration.
If the file cannot be found, the os.pardir parent directory is added to the start of the relative
path and the file checked for.

Update for NESSY in the dispersion software comparison table of the manual.

Expanded the abbreviations of the user manual for many relaxation dispersion terms.

A bit more editing of the dispersion software comparison table of the manual.

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

This is based on feedback from Ian Kleckner <ian dott kleckner att gmail dott com>.

More updates for the dispersion software comparison table in the manual.

Updates for the grid search and GLOVE in the dispersion software comparison table in the manual.

More updates for the dispersion software comparison in the manual.

Editing and expansion of the dispersion software comparison table in the manual.

The optimisation algorithms are now listed, where known. A number of entries and sections have also
been rearranged.

Removed a now unneeded midrule from the dispersion software comparison table.