Add Python 3 modules, and more Python 2 modules.

Also, sort names alphabetically and add module docstrings.

python2/zipimport.py

@@ -0,0 +1,14 @@
+"""Stub file for the 'zipimport' 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.
+
+class zipimporter(object):
+    def find_module(a: str, *args, **kwargs) -> NoneType: pass
+    def get_code(a: str) -> object: pass
+    def get_data(a: str) -> str:
+        raise IOError()
+    def get_filename(a: str) -> str: pass
+    def get_source(a: str) -> object: pass
+    def is_package(a: str) -> bool: pass
+    def load_module(a: str) -> object: pass