Numpy 1.12.0 updated iscomplexobj which always shows False for
tinyarrays, which makes assert_almost_equal fail for complex
array-valued arguments, as they will not be split up into real and
imaginary part. We circumvent this bug by testing every entry
separately in this case. This bug will be fixed for Numpy 1.12.1.

Fixes #11

This silences the warning about "invalid suffix on literal".

These two options are pure setuptools functionality and problematic:
https://pip.pypa.io/en/stable/user_guide/?highlight=setup_requires#installation-bundles

Also fixes other memory leads. Previously, load_index_seq_as_long did
not correctly DECREF the new reference created by PySequence_Fast.

fixes #10

Python2's weird comparison semantics are inconsistent with what
we expect when `NotImplemented` is returned.

If the arrays do not have the same shape then we return NotImplemented.

A new method `object_size` is added to the Array template class, which
calculates the total size of the Python object in bytes.  The function
`size_of` then wraps this method and provides the necessary interface
for a Python method object.