Merge p3yk branch with the trunk up to revision 45595. This breaks a fair

number of tests, all because of the codecs/_multibytecodecs issue described
here (it's not a Py3K issue, just something Py3K discovers):
http://mail.python.org/pipermail/python-dev/2006-April/064051.html

Hye-Shik Chang promised to look for a fix, so no need to fix it here. The
tests that are expected to break are:

test_codecencodings_cn
test_codecencodings_hk
test_codecencodings_jp
test_codecencodings_kr
test_codecencodings_tw
test_codecs
test_multibytecodec

This merge fixes an actual test failure (test_weakref) in this branch,
though, so I believe merging is the right thing to do anyway.

Tools/pybench/Instances.py

@@ -0,0 +1,68 @@
+from pybench import Test
+
+class CreateInstances(Test):
+
+    version = 0.2
+    operations = 3 + 7 + 4
+    rounds = 60000
+
+    def test(self):
+
+        class c:
+            pass
+
+        class d:
+            def __init__(self,a,b,c):
+                self.a = a
+                self.b = b
+                self.c = c
+
+        class e:
+            def __init__(self,a,b,c=4):
+                self.a = a
+                self.b = b
+                self.c = c
+                self.d = a
+                self.e = b
+                self.f = c
+
+        for i in xrange(self.rounds):
+            o = c()
+            o1 = c()
+            o2 = c()
+            p = d(i,i,3)
+            p1 = d(i,i,3)
+            p2 = d(i,3,3)
+            p3 = d(3,i,3)
+            p4 = d(i,i,i)
+            p5 = d(3,i,3)
+            p6 = d(i,i,i)
+            q = e(i,i,3)
+            q1 = e(i,i,3)
+            q2 = e(i,i,3)
+            q3 = e(i,i)
+
+    def calibrate(self):
+
+        class c:
+            pass
+
+        class d:
+            def __init__(self,a,b,c):
+                self.a = a
+                self.b = b
+                self.c = c
+
+        class e:
+            def __init__(self,a,b,c=4):
+                self.a = a
+                self.b = b
+                self.c = c
+                self.d = a
+                self.e = b
+                self.f = c
+
+        for i in xrange(self.rounds):
+            pass
+
+