Add Python 3 modules, and more Python 2 modules.

Also, sort names alphabetically and add module docstrings.

python2/xxsubtype.py

@@ -0,0 +1,17 @@
+"""Stub file for the 'xxsubtype' module."""
+# This is an autogenerated file. It serves as a starting point
+# for a more percise manual annotation of this module.
+# Feel free to edit the source below, but remove this header when you do.
+
+def bench(a, b: str, *args, **kwargs) -> float: pass
+
+
+class spamdict(object):
+    def getstate() -> int: pass
+    def setstate(a: int) -> NoneType: pass
+
+class spamlist(object):
+    def classmeth(*args, **kwargs) -> tuple: pass
+    def getstate() -> int: pass
+    def setstate(a: int) -> NoneType: pass
+    def staticmeth(*args, **kwargs) -> tuple: pass