Update to the latest from git:
- add AST.__init__ annotation
- Change datetime.datetime.astimezone tz argument type from timezone to tzinfo
- A couple new definitions, some more unicode for 2.7
- Fix html.escape signature
- Add types for gettext
- Fix type of getsockopt
- type `errors` in codecs.EncodedFile
- Add __version__ to requests
- Use __delete__, not __del__, in class property.
- getpass return str
- Make property a type
- Almost all re functions take a compiled pattern.
- Add note about not using basestring in tempfile
- Accept more unicode in 2.7 tempfile stubs
- Add some missing "type" attributes
- fix integration of io with mypy
- Add apply() and coerce() to 2.7 builtins.
- Add __future__.generator_stop for Python 3.5
- Fix subprocess stubs
- improve io
- Add os.replace()
- enable string arguments for start, end, and span methods of Match object