explicitly handle CloneNode in replacement transforms to make sure we take care of its content argument

Conflicts:
	tests/run/iterdict.pyx

Conflicts:
	CHANGES.rst

Fixes http://trac.cython.org/ticket/864.

--HG--
extra : amend_source : d2a97da4f942d555723b9bfa488985c5e5c27721

explicitly cast digits during PyLong conversion to avoid relying on potentially unsafe C coercion (fixes ticket #865)

Fix exception handling for overloaded operators.

__Pyx_decode_c_string: check for overflow when calling strlen.

Fixes http://trac.cython.org/ticket/864.

--HG--
extra : amend_source : d2a97da4f942d555723b9bfa488985c5e5c27721

fix cname override for helper functions: 'str' compile time values no longer require decoding in Py3

make str values in compile time DEF env turn into actually usable Unicode strings when compiling under Python 3

copy over "test_call.py" test from CPython 3.5+ to disable an error test that prevents it from building in Cython

Fix typos.

Conflicts:
	CHANGES.rst