Add initial implementation of importlib. See the NOTES files for what is

planned for the package.

There are no docs yet, but they are coming once the API for the first new
function, importlib.import_module() is finalized.

Lib/importlib/test/source/test_path_hook.py

@@ -0,0 +1,23 @@
+import importlib
+from .. import support
+import unittest
+
+
+class PathHookTest(unittest.TestCase):
+
+    """Test the path hook for source."""
+
+    def test_success(self):
+        # XXX Only work on existing directories?
+        with support.create_modules('dummy') as mapping:
+            self.assert_(hasattr(importlib.FileImporter(mapping['.root']),
+                                 'find_module'))
+
+
+def test_main():
+    from test.support import run_unittest
+    run_unittest(PathHookTest)
+
+
+if __name__ == '__main__':
+    test_main()