re-publicize InstancedGeometry no-arg constructor, correct erroneous javadoc#1230

Merged

stephengold merged 2 commits intojMonkeyEngine:masterfrom

stephengold:master

Dec 4, 2019

Commits on Dec 3, 2019

re-publicize 3 no-arg constructors, correct/remove erroneous javadoc
stephengold
committed
re-protect 2 no-arg constructors, restore javadoc
stephengold
committed