Removing lists of Atom object's properties.
Removing lists of Atom object's properties.

The lists were pointless since they were always being
updated within the methods that returned them. Therefore
just return a list of updated properties.

Replacing self._data with just self where appropriate.

scikit-nano/scikit-nano,androomerrill/scikit-nano,scikit-nano/scikit-nano,androomerrill/scikit-nano