--HG--
rename : tests/compile/c_options.pyx => tests/compile/c_directives.pyx
rename : tests/errors/e_options.pyx => tests/errors/e_directives.pyx

Side-effect: Buffer access starts working within list comprehensions.

This time hopefully without breaking other inplace operators.

Do not require malloc for format string for common cases.
Provide __cythonbufferdefaults__
More robust for changing NumPy APIs
;