model.data: if regression has no data object, stop!
predictOMatic examples: do budworm example.
before clean up usages of fl symbols in predictOMatic
Major revision of model.data, getting rid of "fl" argument,
no longer deprecated, now replaced by predVals.
remove fl from predictOMatic name
separate drawing work in plotSlopes from other. BIG change.
version bump to 1.7.6.1