parse __init__.py for version number instead of importing the file
    see http://stackoverflow.com/questions/458550/standard-way-to-embed-version-into-python-package

def get_version():
    """
    parse __init__.py for version number instead of importing the file
    see http://stackoverflow.com/questions/458550/standard-way-to-embed-version-into-python-package
    """
    version_file = os.path.join(PKG, 'lib/version.py')
    ver_str_line = open(version_file, "rt").read()
    version_regex = r'^__version__ = [\'"]([^\'"]*)[\'"]'
    mo = re.search(version_regex, ver_str_line, re.M)
    if mo:
        return mo.group(1)
    else:
        raise RuntimeError('Unable to find version string in %s.'
                           % (version_file,))