Merge remote-tracking branch 'origin/develop' into develop

docs/user/install.rst

@@ -18,7 +18,7 @@ or, with `easy_install <http://pypi.python.org/pypi/setuptools>`_::
 
     $ easy_install requests
 
-But, you really `shouldn't do that <http://www.pip-installer.org/en/latest/index.html#pip-compared-to-easy-install>`_.
+But, you really `shouldn't do that <http://www.pip-installer.org/en/latest/other-tools.html#pip-compared-to-easy-install>`_.
 
 
 

requests/status_codes.py

@@ -56,6 +56,9 @@ _codes = {
     424: ('failed_dependency', 'dependency'),
     425: ('unordered_collection', 'unordered'),
     426: ('upgrade_required', 'upgrade'),
+    428: ('precondition_required', 'precondition'),
+    429: ('too_many_requests', 'too_many'),
+    431: ('header_fields_too_large', 'fields_too_large'),
     444: ('no_response', 'none'),
     449: ('retry_with', 'retry'),
     450: ('blocked_by_windows_parental_controls', 'parental_controls'),