Added the equations for different exponenyials.
This was proposed by Ed at: https://mail.gna.org/public/relax-devel/2011-06/msg00154.html Message-id: <BANLkTinjNpCCCOa=vbs1asf_zSicQbxvDA@...>
Authored by: semor 2011-06-17
Parent: [r13099]
Child: [r13101]
