TST: Add basic tests for 0-d np.nditer/np.nested_iter support
TST: Add test that einsum multiplies scalars fine
MAINT: Remove np.ndindex 0-d hack.
DOC: Add documentation clarifying the use of oa_ndim
DOC: mention AdvancedNew iterator change in the release notes.
MAINT: Remove 0-d iterator special case from ufunc_object.c