relax SVN archive

Creating a branch for improving the diffusion tensor code.

Improved the text or docstring of the user function 'diffusion_tensor.set'.

Many bugs in the new docstring parsing code have been fixed.

Most of the docstring processing for the manual has been rewritten.

Modified the front page of the manual.

The Ulysses butterfly is now the symbol of relax.

The manual cover has been touched up an the ulysses image added.

Started to insert the Ulysses picture at the cover of the manual and removal of the non-eps
dependencies images as they are stored in the relax paper.

Small change to the full_analysis.py sample script.

Bug fix:

Another large bug fix! This time the linear constraints were failing due to the diagonal scaling.
The tm, te, ts, and tf parameters must all be scaled the same if a constraint with more than one
of these parameters is used.

Massive bug fix!!!

Caught the bug causing problems with Newton minimisation of the diffusion parameters together with
the model-free parameters. The scaling matrix was not being constructed properly! Only the first
residue's parameters were being scaled 'index = 0', all the rest were unscaled. The bug was because
the model-free specific minimise function was passing in the index of zero rather than None!!!

Changed the global default line search algorithm from More and Thuente to Backtracking.