Added definition and dictionary, for each model, to determine which model they nest from.
This is better to Hard-code, since it makes it possible to produce a table with an overview, and accurately determine which model is nested from.
This is discussed in thread. http://thread.gmane.org/gmane.science.nmr.relax.devel/6684
Authored by: tlinnet 2014-08-19
Parent: [r25065]
Child: [r25067]
