Log Message:
Update py-cython to 0.24.

0.24 (2016-03-xx)
=================

Features added
--------------

* PEP 498: Literal String Formatting (f-strings).
  Original patch by Jelle Zijlstra.
  https://www.python.org/dev/peps/pep-0498/

* PEP 515: Underscores as visual separators in number literals.
  https://www.python.org/dev/peps/pep-0515/

* Parser was adapted to some minor syntax changes in Py3.6, e.g.
  https://bugs.python.org/issue9232

* The embedded C code comments that show the original source code
  can be discarded with the new directive ``emit_code_comments=False``.

* Cpdef enums are now first-class iterable, callable types in Python.

* Ctuples can now be declared in pure Python code.

* Posix declarations for DLL loading and stdio extensions were added.
  Patch by Lars Buitinck.

* The Py2-only builtins ``unicode()``, ``xrange()``, ``reduce()`` and
  ``long`` are now also available in compile time ``DEF`` expressions
  when compiling with Py3.

* Exception type tests have slightly lower overhead.
  This fixes ticket 868.

* @property syntax fully supported in cdef classes, old syntax deprecated.

* C++ classes can now be declared with default template parameters.

Bugs fixed
----------

* C++ exceptions raised by overloaded C++ operators were not always
  handled.  Patch by Ian Henriksen.

* C string literals were previously always stored as non-const global
  variables in the module.  They are now stored as global constants
  when possible, and otherwise as non-const C string literals in the
  generated code that uses them.  This improves compatibility with
  strict C compiler options and prevents non-const strings literals
  with the same content from being incorrectly merged.

* Compile time evaluated ``str`` expressions (``DEF``) now behave in a
  more useful way by turning into Unicode strings when compiling under
  Python 3.  This allows using them as intermediate values in expressions.
  Previously, they always evaluated to bytes objects.

* ``isinf()`` declarations in ``libc/math.pxd`` and ``numpy/math.pxd`` now
  reflect the actual tristate ``int`` return value instead of using ``bint``.

* Literal assignments to ctuples avoid Python tuple round-trips in some
  more corner cases.

* Iteration over ``dict(...).items()`` failed to get optimised when dict
  arguments included keyword arguments.

* cProfile now correctly profiles cpdef functions and methods.

0.23.5 (2016-03-26)
===================

* Compile errors and warnings in integer type conversion code.  This fixes
  ticket 877.  Patches by Christian Neukirchen, Nikolaus Rath, Ian Henriksen.

* Reference leak when "*args" argument was reassigned in closures.

* Truth-testing Unicode strings could waste time and memory in Py3.3+.

* Return values of async functions could be ignored and replaced by ``None``.

* Compiler crash in CPython 3.6.

* Fix prange() to behave identically to range().  The end condition was
  miscalculated when the range was not exactly divisible by the step.

* Optimised ``all(genexpr)``/``any(genexpr)`` calls could warn about unused
  code.  This fixes ticket 876.