Update 'requests' lib to v2.0.

third_party/requests/status_codes.py

 # -*- coding: utf-8 -*-
 
 from .structures import LookupDict
 
 _codes = {
 
     # Informational.
     100: ('continue',),
     101: ('switching_protocols',),
     102: ('processing',),
     103: ('checkpoint',),
     122: ('uri_too_long', 'request_uri_too_long'),
     200: ('ok', 'okay', 'all_ok', 'all_okay', 'all_good', '\\o/', '✓'),
     201: ('created',),
     202: ('accepted',),
     203: ('non_authoritative_info', 'non_authoritative_information'),
     204: ('no_content',),
     205: ('reset_content', 'reset'),
     206: ('partial_content', 'partial'),
     207: ('multi_status', 'multiple_status', 'multi_stati', 'multiple_stati'),
-    208: ('im_used',),
+    208: ('already_reported',),
+    226: ('im_used',),
 
     # Redirection.
     300: ('multiple_choices',),
     301: ('moved_permanently', 'moved', '\\o-'),
     302: ('found',),
     303: ('see_other', 'other'),
     304: ('not_modified',),
     305: ('use_proxy',),
     306: ('switch_proxy',),
     307: ('temporary_redirect', 'temporary_moved', 'temporary'),
@@ skipping 46 matching lines @@
     510: ('not_extended',),
 }
 
 codes = LookupDict(name='status_codes')
 
 for (code, titles) in list(_codes.items()):
     for title in titles:
         setattr(codes, title, code)
         if not title.startswith('\\'):
             setattr(codes, title.upper(), code)