Added all PyTypeObjects to the appropriate header files.
Before the patch a lot of internal types weren't available in the header files. The patch exposes the new iterators, views and some other types to all C modules. I've also renamed some of the types and tp_names.
diff --git a/Objects/setobject.c b/Objects/setobject.c
index e4e7780..11ca407 100644
--- a/Objects/setobject.c
+++ b/Objects/setobject.c
@@ -849,7 +849,7 @@
 	return NULL;
 }
 
-static PyTypeObject PySetIter_Type = {
+PyTypeObject PySetIter_Type = {
 	PyVarObject_HEAD_INIT(&PyType_Type, 0)
 	"set_iterator",				/* tp_name */
 	sizeof(setiterobject),			/* tp_basicsize */