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