bugfix: getattr->missing only on public attributes

__getattr__ was calling __missing__ if default_factory was defined, regardless of whether those were methods that should be accessible as attributes (or just as keys)
no need to define __copy__, __deepcopy__

This was actually a result of the __missing__ bug. AttrDict was creating terrible versions of magic methods.
make pylint happy
no docs folder, no need to recursively include
v1.1.0 (thanks @jtratner)