relax SVN archive

Created some synthetic data for the 'NS R1rho 3-site linear' dispersion model using cpmg_fit.

Updated the lib.dispersion.ns_r1rho_2site module docstring to explain the origin of the equations.

This includes the Korzhnev 2005 reference where the modifications come from.

Fix for the Palmer and Massi 2006 citation in the dispersion chapter of the manual.

Added a To do entry for the 3-site and N-site analytic R1rho models listed in Palmer and Massi 2006.

This is for the 'To do' section of the dispersion chapter of the user manual.

Large rearrangements in the dispersion chapter of the user manual.

The MMQ CPMG-type experiments now follow from the SQ CPMG-type experiments, hence the R1rho models
are now listed last.

Updated the ShereKhan error estimation technique in the dispersion software comparison table.

This is for the dispersion chapter of the user manual. Adam Mazur communicated that errors are
estimated using the covariance matrix in a private mail.

Removed the 'CR72' model for GUARDD from the dispersion software comparison table.

This is for the dispersion chapter of the user manual. This software, like cpmg_fit, only supports
the 'MMQ CR72' model which gives slightly different results to the original 'CR72' model when using
only SQ CPMG-type data. Hence supporting 'MMQ CR72' does not automatically mean that the 'CR72'
model can be optimised.

Removed the 'CR72' model for cpmg_fit from the dispersion software comparison table.

This is for the dispersion chapter of the user manual.

Added the Korzhnev 2005 R1rho constant time correction to the 'To do' section of the dispersion chapter.

This is for the user manual.

Updated the Relax_disp.test_tp02_data_to_ns_r1rho_2site system test.

This is for the fixes of the 'NS R1rho 2-site' dispersion model.