This is necessary to use some C++ APIs, and ugly if not impossible
to work around using cname specifiers and external files.

Add Cython.Compiler.Importer to import code which relies on functionality that is not portable across python versions

This reverts commit 95b6e693.

This reverts commit 1eabb1c6.

This reverts commit 6f2271d2.

Conflicts:

	Cython/Compiler/ParseTreeTransforms.py

NumPy is starting to seriously deprecating access to the member fields
in an ndarray (it was always frowned upon, but now it is starting to
become enforced). To support the large body of Cython code out there
accessing these fields (arr.shape[0] and so on), we special-case
PyArrayObject in Cython, with special knowledge of the NumPy API.

Ideally, we may introduce features in Cython in the future that allows
specifying this kind of magic with syntax in pxd files, and then we can
move away from special-casing NumPy.

generator's attribute.

removed lots of unused imports, delayed some imports that are only needed for Cython specific syntax

--HG--
extra : rebase_source : a2df3675fd1efae1a1122ca9742e99ab1405fba6