Add security_token parameter to STSConnection
Added missed notes about the cn-north-1 region.
Documentation: add C3 family to the instance list
Documentation: fix typo in import_key_pair()
Add SriovNetSupport to Image and register_image
Fixes #1933.
Merge pull request #1938 from rayrayson/develop

Documentation: add C3 family to the instance list
Added ``cn-north-1`` to the regions.
Merge branch 'china-regions' into develop
Fix #1898 by doing an initial call to `datetime.strptime`

This commit works around an upstream threading bug
http://bugs.python.org/issue7980 which affects Mac OS X. It includes a
test which is skipped by default because it will not always fail.
Merge pull request #1940 from danielgtaylor/strptime-bug

Fix #1898, #1940 by doing an initial call to `datetime.strptime`
Updated all old-style inheritance calls.
Add unit test for STS security_token
Merge pull request #1948 from danielgtaylor/jimbrowne-sts-secure-token

Pass security token through to STS connection. Fixes #1948, #1931.
Missed two spots for use of ``super(…)``.
Merge branch 'switch-to-super' into develop
Fixes #1918, #1936 & #1937.
Add release notes script

Adds a script to find the latest release and gather all commits
from then until the latest commit, then spits out restructured
text.
Merge branch 'master' into release-2.21.1
Bumped to version 2.21.1!