Changes

The idea is that real or synthetic data (here , for example as Sparky peak lists) , is obtained or created for the model and added to the test suite directory test_suite/shared_data/dispersion/. This is then used in a system test to check that the code in relax can reproduce the data.  === Synthetic data === It is very important that the code added to the relax library is not used to create the synthetic data! This type of data is useful for checking that the known solution can be found by relax. The only issue is that the same mistake can be made in both relax and the script used to generated the synthetic data, in which case the buggy relax code will never be detected. To mitigate against this, testing against other software is recommended. === Measured data === An alternative is to use real measured relaxation dispersion data. This data should be added as peak lists containing peak intensities to test_suite/shared_data/dispersion/. As the real solution cannot be known a priori, the results from relax must be compared to results obtained from another software program (possibly directly from a publication).