setup.py: fixed requirement - its interesting to see that there are two different keywords for distutils and setuptools, the latter one doesn't read the ones of the first one, unfortunately

Author: Byron

lib/git/ext/gitdb

@@ -62,6 +62,7 @@ def _stamp_version(filename):
       package_dir = {'':'lib'},
       license = "BSD License",
       requires=('gitdb (>=0.5)',),
+      install_requires='gitdb >= 0.5.0',
       long_description = """\
 GitPython is a python library used to interact with Git repositories""",
       classifiers = [