relax SVN archive

Large expansion of the relax icon set.

All 128x128 versions of the icons used by the user functions have been added as both PNG and gzipped
EPS files. A few gzipped SVG and non-sized icons have been added as well.

Large expansion of the Oxygen icons within relax.

All 128x128 versions of the icons used by the user functions have been added as both PNG and gzipped
EPS files. A number of gzipped SVG icons has been added as well.

Modified the graphics.fetch_icon function to return different file formats.

This will be used for the relax manual where eps.gz files are required.

Small fix for the model-free chapter of the relax manual.

Improvements to the final section of the relaxation curve-fitting chapter.

The Xmgrace screenshot and page references for the user functions have been added.

Added screenshots of Xmgrace displaying relaxation curves.

The fetch_docstrings.py now adds LaTeX labels to each user function section.

This has the form of 'uf: ' followed by the user function name, and is for referencing purposes
within the main text.

Small fix for the sample script in the relaxation curve-fitting chapter of the relax manual.

Small fix for the sample script in the NOE chapter of the relax manual.

Rewrote the relaxation curve-fitting chapter of the relax manual.

This chapter was quite out of date and was of no use to modern relax versions!