Add importlib.machinery with its first tenants, BuitinImporter and

FrozenImporter. Docs forthcoming.

I plan on all finders and loaders (and most likely hooks) to live
in imoprtlib.machinery. Utility stuff will end up in importlib.util.
Higher-level API stuff will stay on imoprtlib directly (e.g. import_module).

Lib/importlib/test/builtin/test_finder.py

@@ -1,4 +1,4 @@
-import importlib
+from importlib import machinery
 from .. import support
 
 import sys
@@ -12,7 +12,7 @@ class FinderTests(unittest.TestCase):
     name = 'errno'
 
     find_module = staticmethod(lambda name, path=None:
-                    importlib.BuiltinImporter().find_module(name, path))
+                    machinery.BuiltinImporter.find_module(name, path))
 
 
     def test_find_module(self):

Lib/importlib/test/builtin/test_loader.py

@@ -1,4 +1,5 @@
 import importlib
+from importlib import machinery
 from .. import support
 
 import sys
@@ -23,7 +24,7 @@ class LoaderTests(unittest.TestCase):
         self.assert_(module.__name__ in sys.modules)
 
     load_module = staticmethod(lambda name:
-                                importlib.BuiltinImporter().load_module(name))
+                                machinery.BuiltinImporter.load_module(name))
 
     def test_load_module(self):
         # Common case.

Lib/importlib/test/frozen/test_finder.py

@@ -1,4 +1,4 @@
-import importlib
+from importlib import machinery
 from ..builtin import test_finder
 from .. import support
 
@@ -10,7 +10,7 @@ class FinderTests(test_finder.FinderTests):
     """Test finding frozen modules."""
 
     def find(self, name, path=None):
-        finder = importlib.FrozenImporter()
+        finder = machinery.FrozenImporter
         return finder.find_module(name, path)
 
 

Lib/importlib/test/frozen/test_loader.py

@@ -1,4 +1,4 @@
-import importlib
+from importlib import machinery
 from ..builtin import test_loader
 
 
@@ -6,7 +6,7 @@ class LoaderTests(test_loader.LoaderTests):
 
     name = '__phello__'
     load_module = staticmethod(lambda name:
-                                importlib.FrozenImporter().load_module(name))
+                                machinery.FrozenImporter.load_module(name))
     verification = {'__name__': '__phello__', '__file__': '<frozen>',
                     '__package__': None, '__path__': ['__phello__']}