Merge branch 'release-0.62.0' into develop

* release-0.62.0:
  Bumping version to 0.62.0
  Update CloudSearchDomain model in the latest version.
Made unit test compatible with Python 3.
Merge pull request #334 from kyleknap/test-fix

Made unit test compatible with Python 3.
Added ``page_size`` to control page size.
Merge pull request #335 from kyleknap/expose-keys

Added ``page_size`` to control page size.
Added ``unique_id_uses_count`` to hooks.

This parameter acts like a semaphore/recursive lock for an event with a
unique id such that the event can only be completely removed once the number
of unregister calls to the event equals the number of times it has been
registered.  The unique id event is still only registered once despite multiple
register calls when unique id is used.
Merge pull request #336 from kyleknap/recursive-event

Added ``unique_id_uses_count`` to hooks.
Fixes infinite CPU loop when tunneling for py26.

The bug was in the http standard library for py26. Sometimes the ``_tunnel()``
function entered an infinite while loop due to incorrect assumptions made
on data read in. Especially affected users that were using proxies.
Improved unit test for tunneling bug.
Merge pull request #338 from kyleknap/tunnel-fix

Fixes infinite CPU loop when tunneling for py26.
Updated several models in the latest version.

Changes include doc updates for cognito-sync and iam, add tagging
to kinesis, add bundle logs feature to elasticbeanstalk, and add env
vars to opsworks.
Bumping version to 0.63.0
Merge branch 'release-0.63.0'

* release-0.63.0:
  Bumping version to 0.63.0
  Updated several models in the latest version.
  Improved unit test for tunneling bug.
  Fixes infinite CPU loop when tunneling for py26.
  Added ``unique_id_uses_count`` to hooks.
  Added ``page_size`` to control page size.
  Made unit test compatible with Python 3.