Updated to pybench 2.0.

See svn.python.org/external/pybench-2.0 for the original import of that
version.

Note that platform.py was not copied over from pybench-2.0 since
it is already part of Python 2.5.
diff --git a/Tools/pybench/NewInstances.py b/Tools/pybench/NewInstances.py
old mode 100755
new mode 100644
index a352638..258beba
--- a/Tools/pybench/NewInstances.py
+++ b/Tools/pybench/NewInstances.py
@@ -1,8 +1,17 @@
 from pybench import Test
 
+# Check for new-style class support:
+try:
+    class c(object):
+        pass
+except NameError:
+    raise ImportError
+
+###
+
 class CreateNewInstances(Test):
 
-    version = 0.1
+    version = 2.0
     operations = 3 + 7 + 4
     rounds = 60000