Added model DPL94, to be tested in gui-test Relax_disp.test_r2eff_err_estimate.
This shows that the bug is still there.
bug #22541(https://gna.org/bugs/?22541): The R1 fit flag does not work in the GUI.
Authored by: tlinnet 2014-08-29
Parent: [r25460]
Child: [r25462]
