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/extension/test_finder.py

@@ -0,0 +1,29 @@
+import importlib
+from . import test_path_hook
+
+import unittest
+
+class FinderTests(unittest.TestCase):
+
+    """Test the finder for extension modules."""
+
+    def find_module(self, fullname):
+        importer = importlib.ExtensionFileImporter(test_path_hook.PATH)
+        return importer.find_module(fullname)
+
+    def test_success(self):
+        self.assert_(self.find_module(test_path_hook.NAME))
+
+    def test_failure(self):
+        self.assert_(self.find_module('asdfjkl;') is None)
+
+    # XXX Raise an exception if someone tries to use the 'path' argument?
+
+
+def test_main():
+    from test.support import run_unittest
+    run_unittest(FinderTests)
+
+
+if __name__ == '__main__':
+    test_main()