PointListFileReader returns list of SimpleObjects instead of Points.
Split functionality of PointListFileReader into two classes,
SimpleObjectCreator and GaussianObjectCreator.
Create interface for ObjectCreators.
SuppliedObjectPool constructed with ObjectCreator.
Delete GaussianObjectCreator.
Revert "Delete GaussianObjectCreator."

This reverts commit 49cf4b8a62e5f5d37aa406d039a4ae1b7f362a7a.
Delete GaussianObjectPool.
Place relevant fields in SimpleObjectCreator.
Place relevant fields in GaussianObjectCreator.
Remove unneeded parameters from create method in ObjectCreator.
Remove unused constructor parameters in SuppliedObjectPool.
Create method for adding object creator to experiment.