Modified interface to _Py_[String|Unicode]InsertThousandsGrouping, in anticipation of fixing issue 3140.

in the issue 3165. Now cPickle does not fails with uncontrolled
behaviour when pickling into a very deep nested structure.

it makes the test fail in the trunk.loewis-sun buildbot.

directory creation time...

shutil.rmtree() in the trunk.loewis-sun buildbot.

without necessity.

not fixed length, it mallocs memory if needed. As a result, we
don't have a maximum for the getcwd() method.

specially a section of the subprocess documentation
that helps with the replacing of those functionss.

will contain both FieldStorage and MiniFieldStorage items.

Fixes #1817.

structures follows the common sense (and works like in 2.5 and 3.0).

returns (0, 0, 1) instead of (0, -1, 1), and slice(None, 10, -1).indices(10)
returns (9, 9, -1) instead of (9, 10, -1).

Make bin() implementation parallel oct() and hex() so that int/long subclasses can override or so that other classes can support.