* Updated docutils.utils.version_identifier for Python 2.6 (docutils.VersionInfo).
* Moved code from tests/test/test_utils.py::HelperFunctionsTests.test_version_identifier to tests/test__init__.py::VersionInfoTests.test_version_identifier; uncommented lines in tests/test__init__.py::VersionInfoTests.test_version_info.
* Added new tests/test/test_utils.py::HelperFunctionsTests.test_version_identifier.