Rename the class to match those for other models stored in this way.
And add some missing methods to make it usable as a normal model.
Also tidy up the class a bit.
Without formula simplifications, jltl2ba will produce an APSet L0, L1, ...
With formula simplifications (upcoming commit), some APs can be missing
in the NBA (when irrelevant) or reordered (due to formula simplification).
We handle edge label construction as elsewhere in PRISM for DA, to take
this into account.
git-svn-id: https://www.prismmodelchecker.org/svn/prism/prism/trunk@11186 bbc10eb1-c90d-0410-af57-cb519fbb1720
Dave Parker