2.7 stub updates (#149)

* Stubgen modules for 2.7

Cookie
email._parseaddr
email.utils
genericpath
linecache
mimetypes
multiprocessing
multiprocessing.process
multiprocessing.util
posixpath
quopri
runpy
weakref
wsgiref.validate

* 2.7/typing.py: add missing __contains__ definition

* 2.7/subprocess.py: make output argument to CalledProcessError optional

Commit f08160bd did the same for py3.

* 2.7/hmac.pyi: add compare_digest

This function was introduced to the 2.7 series in 2.7.7.

* Stubgen 2.7/ssl.pyi

This replaces a nearly-empty handwritten stub.

* Copy constants and other definitions from py3 to py2 ssl.pyi

* 2.7/__future__.pyi: add methods

* 2.7/_weakref.pyi: backport some definitions from 3.x version

* Stubgen 2.7/locale.pyi

Hand-edited to remove declarations that are redundant (and cause
conflicts with) the "from _locale import *" line.

stdlib/2.7/email/_parseaddr.pyi

@@ -0,0 +1,44 @@
+# Stubs for email._parseaddr (Python 2)
+#
+# NOTE: This dynamically typed stub was automatically generated by stubgen.
+
+from typing import Any
+
+def parsedate_tz(data): ...
+def parsedate(data): ...
+def mktime_tz(data): ...
+def quote(str): ...
+
+class AddrlistClass:
+    specials = ... # type: Any
+    pos = ... # type: Any
+    LWS = ... # type: Any
+    CR = ... # type: Any
+    FWS = ... # type: Any
+    atomends = ... # type: Any
+    phraseends = ... # type: Any
+    field = ... # type: Any
+    commentlist = ... # type: Any
+    def __init__(self, field): ...
+    def gotonext(self): ...
+    def getaddrlist(self): ...
+    def getaddress(self): ...
+    def getrouteaddr(self): ...
+    def getaddrspec(self): ...
+    def getdomain(self): ...
+    def getdelimited(self, beginchar, endchars, allowcomments=True): ...
+    def getquote(self): ...
+    def getcomment(self): ...
+    def getdomainliteral(self): ...
+    def getatom(self, atomends=None): ...
+    def getphraselist(self): ...
+
+class AddressList(AddrlistClass):
+    addresslist = ... # type: Any
+    def __init__(self, field): ...
+    def __len__(self): ...
+    def __add__(self, other): ...
+    def __iadd__(self, other): ...
+    def __sub__(self, other): ...
+    def __isub__(self, other): ...
+    def __getitem__(self, index): ...

stdlib/2.7/email/utils.pyi

@@ -0,0 +1,22 @@
+# Stubs for email.utils (Python 2)
+#
+# NOTE: This dynamically typed stub was automatically generated by stubgen.
+
+from email._parseaddr import AddressList as _AddressList
+from email._parseaddr import mktime_tz as mktime_tz
+from email._parseaddr import parsedate as _parsedate
+from email._parseaddr import parsedate_tz as _parsedate_tz
+from quopri import decodestring as _qdecode
+
+def formataddr(pair): ...
+def getaddresses(fieldvalues): ...
+def formatdate(timeval=None, localtime=False, usegmt=False): ...
+def make_msgid(idstring=None): ...
+def parsedate(data): ...
+def parsedate_tz(data): ...
+def parseaddr(addr): ...
+def unquote(str): ...
+def decode_rfc2231(s): ...
+def encode_rfc2231(s, charset=None, language=None): ...
+def decode_params(params): ...
+def collapse_rfc2231_value(value, errors='', fallback_charset=''): ...