Use safer is_int() function for type-checking both ints and longs
Improve tests for newbytes object
Don't disable obsolete Py2 names with ``from future.builtins import *``

- These can still be disabled if needed using::

    from future.builtins.disabled import *

But they can be handy -- e.g. for user code like this:

    if PY2:
        if isinstance(x, long):
            ...
Add a backported Py3 int object (subclass of Py2 long)
Add tests for comparing (unicode) strings to incompatible types

- Py3 is stricter about this than Py2.
Fix is_int on Py3
Use isinstance(obj, numbers.Integral) for all int isinstance checks
Add additional str and bytes tests
Rename is_text and is_bytes to istext and isbytes
Tighten up str and bytes comparisons with other objects
Use isbytes and istext in the backported http.client module
Draft: Add native() function in future.utils
More little improvements to newint and newstr
Enable backported ``int`` in future.builtins
Update ChangeLog; update docs about disabled Py2 builtins
Simplify package-level docstring

* This example code is already in README.rst and docs/source/overview.rst
Bump version to 0.6.1-dev