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/Include/unicodeobject.h b/Include/unicodeobject.h
index f3c37fe..4e94f76 100644
--- a/Include/unicodeobject.h
+++ b/Include/unicodeobject.h
@@ -417,6 +417,7 @@
 } PyUnicodeObject;
 
 PyAPI_DATA(PyTypeObject) PyUnicode_Type;
+PyAPI_DATA(PyTypeObject) PyUnicodeIter_Type;
 
 #define SSTATE_NOT_INTERNED 0
 #define SSTATE_INTERNED_MORTAL 1