repair deep-copying (and pickling) of the control flow state in compiled Cython (extension type instances lost their state)

When used in a range operation, it may be coerced to an object,
and then back to an int.  If the operands were already integer
types we should preserve these rather than coercing to the
default int type of long.

docs: Fix typos.

Path search fix

Cpp limits

Deprecate the 'property …:' syntax, as suggested in #462

docs: Fix typos.

docs: Remove duplicated words.

Add a pass transforming Python-style properties in cdef class into Cython-style properties

This makes properties work properly in cdef classes, and gives them the
exact same AST as the “property something:” blocks, whose syntax should
probably be deprecated now.

Fixes T264.

Normalize filenames when calling parse_dependencies()

Conflicts:
	CHANGES.rst