Boxsdk

- Added support to the search endpoint for metadata filters.
- Added support to the search endpoint for filtering based on result
type and content types.

- Added support for the /shared_items endpoint.
`client.get_shared_item` can be used to get information about a
shared link. See <https://developers.box.com/docs/#shared-items>

Bugfixes

- Certain endpoints (e.g. search, get folder items) no longer raise an
exception when the response contains items that are neither files
nor folders.

- A minor change to namespacing. The `OAuth2` class can now be
imported directly from `boxsdk`. Demo code has been updated to
reflect the change.

Features

- The SDK now supports Box metadata. See the [metadata
docs](https://developers.box.com/metadata-api/) for more
information.
- The object paging API has been improved. SDK extensions that need
fine-grained control over when the next "page" of API results will
be fetched can now do that.

Example Code

- The example code has been improved to be more robust and to work
with all Python versions supported by the SDK (CPython 2.6-2.7,
CPython 3.3-3.4, and PyPy).
- The example code has an example on how to use the new metadata
feature.
- The README has improved code examples.

Bugfixes

- Oauth2 redirect URIs containing non-ASCII characters are now
supported.