relax SVN archive

Added the initial results of the CR72 model in relax for Flemming Hansen's truncated CPMG data.

Renamed the file for comparing different dispersion software with Flemming Hansen's CPMG data.

The CR72 dispersion model equations are now more robust against math domain errors.

This is for the trigonometric functions which cannot handle certain input values.

Fix for the spin container list of parameters for the CR72 model.

Fixes to the specific_analyses.relax_disp modules to add support for the CR72 dispersion model.

The parameters for the CR72 model are now both correct and correctly handled.

Import fix for the lib.dispersion.cr72 module.

Initial implementation of the CR72 target function.

Added the CR72 model equations to the relax library.

This is for the Carver and Richards 1972 2-site exchange model covering all time scales.

Removed the commented out junk model code from the relax_disp.select_model user function frontend.

Updated the relax_disp.select_model user function frontend for the CR72 dispersion model.

This includes fixing the parameter list and the equations presented to the user.