Version 1.0.1 cannot be installed

Since 6efd1a518838dba553b213a457e3b0b493378713 (included in v 1.0.1 release), xworkflows cannot be installed anymore:

    $ python setup.py build
    running build
    running build_py
    Traceback (most recent call last):
      File "setup.py", line 55, in <module>
        test_suite='tests',
      File "/usr/lib/python2.7/distutils/core.py", line 152, in setup
        dist.run_commands()
      File "/usr/lib/python2.7/distutils/dist.py", line 953, in run_commands
        self.run_command(cmd)
      File "/usr/lib/python2.7/distutils/dist.py", line 972, in run_command
        cmd_obj.run()
      File "/usr/lib/python2.7/distutils/command/build.py", line 128, in run
        self.run_command(cmd_name)
      File "/usr/lib/python2.7/distutils/cmd.py", line 326, in run_command
        self.distribution.run_command(command)
      File "/usr/lib/python2.7/distutils/dist.py", line 972, in run_command
        cmd_obj.run()
      File "/home/damien/env/xw/local/lib/python2.7/site-packages/distribute-0.6.24-py2.7.egg/setuptools/command/build_py.py", line 91, in run
        self.build_packages()
      File "/usr/lib/python2.7/distutils/command/build_py.py", line 372, in build_packages
        self.build_module(module, module_file, package)
      File "/home/damien/env/xw/local/lib/python2.7/site-packages/distribute-0.6.24-py2.7.egg/setuptools/command/build_py.py", line 108, in build_module
        outfile, copied = _build_py.build_module(self, module, module_file, package)
      File "/usr/lib/python2.7/distutils/command/build_py.py", line 333, in build_module
        "'package' must be a string (dot-separated), list, or tuple")
    TypeError: 'package' must be a string (dot-separated), list, or tuple

Using `setuptools.find_packages()` solves the issue.