Log Message:
Version 4.4.1
- No code changes: just corrected packaging for Python 2.7 Linux wheels.

Version 4.4
- Reports could produce the wrong file names for packages, reporting ``pkg.py``
  instead of the correct ``pkg/__init__.py``.  This is now fixed.  Thanks, Dirk
  Thomas.

- XML reports could produce ``<source>`` and ``<class>`` lines that \ 
together
  didn't specify a valid source file path.  This is now fixed. (`issue 526`_)

- Namespace packages are no longer warned as having no code. (`issue 572`_)

- Code that uses ``sys.settrace(sys.gettrace())`` in a file that wasn't being
  coverage-measured would prevent correct coverage measurement in following
  code. An example of this was running doctests programmatically. This is now
  fixed. (`issue 575`_)

- Errors printed by the ``coverage`` command now go to stderr instead of
  stdout.

- Running ``coverage xml`` in a directory named with non-ASCII characters would
  fail under Python 2. This is now fixed. (`issue 573`_)