[FIX] setup.py: babel.dates.format_timedelta required, added in 1.0

bzr revid: odo@openerp.com-20140409081459-07uyfgfk03jevch4

setup.py

@@ -115,7 +115,7 @@ setuptools.setup(
       #include_package_data = True,
       install_requires = [
           'pychart', # not on pypi, use: pip install http://download.gna.org/pychart/PyChart-1.39.tar.gz
-          'babel',
+          'babel >= 1.0',
           'docutils',
           'feedparser',
           'gdata',