Update to 3.2:

Version 3.2
-----------

(bugfix release, released on August 22nd 2014)

- Added missing `err` parameter forwarding to the `secho` function.
- Fixed default parameters not being handled properly by the context
  invoke method.  This is a backwards incompatible change if the function
  was used improperly.  See :ref:`upgrade-to-3.2` for more information.
- Removed the `invoked_subcommands` attribute largely.  It is not possible
  to provide it to work error free due to how the parsing works so this
  API has been deprecated.  See :ref:`upgrade-to-3.2` for more information.
- Restored the functionality of `invoked_subcommand` which was broken as
  a regression in 3.1.


(wiz)