Document `initializedcheck` compiler directive.

add strings.pxd to Includes/libc

Enhance cython defintion of the Numpy dtype

improve robustness of xmlrunner in face of custom test error handling mechanisms in Python regression test suite

Optimize reversed(range(...)), with non-constant values.

Also extend glob to support bash {a,b,c} notation (needed for Cythonize script).

Fix condition in declare_cpp_class

The profiler filters lines on the function's __code__ attribute, which
must agree with that created in the profile frame.  Unfortunately, this
makes it difficult to profile anything but 'def' functions.