Merge branch 'er/python-version-requirements'

Some python scripts we ship cannot be run with older versions of the
interpreter.

* er/python-version-requirements:
  Add checks to Python scripts for version dependencies.

git-remote-testpy.py

@@ -31,6 +31,11 @@ from git_remote_helpers.git.exporter import GitExporter
 from git_remote_helpers.git.importer import GitImporter
 from git_remote_helpers.git.non_local import NonLocalGit
 
+if sys.hexversion < 0x01050200:
+    # os.makedirs() is the limiter
+    sys.stderr.write("git-remote-testgit: requires Python 1.5.2 or later.\n")
+    sys.exit(1)
+
 def get_repo(alias, url):
     """Returns a git repository object initialized for usage.
     """