Log Message:
Update net/py-dropbox to 2.2.0.

Changes in 2.2.0 (2014-09-16)
-----------------------------
- Support for Datastore sharing
- `DropboxClient.get_file()`: Add support for `start`, `length` parameters.
- Add support for the /longpoll_delta API
- Add direct support for /chunked_upload and /commit_chunked_upload APIs
- Fix error handling in ChunkedUploader
- Make tests compatible with py.test
- Various docstring updates (including OAuth 1->2 example)
- Fix encoding issues in example/cli_client.py
- Fix unicode handling for URL parameters

Changes in 2.1.0 (2014-06-03)
-----------------------------
- The datastore API now includes size accessors to allow you to check the size \ 
of your data and avoid the syncing limits.
- The datastore Date() constructor now truncates timestamps to the supported \ 
resolution, i.e. milliseconds.
- The datastore `await*()` calls now use POST instead of GET.
- Datastore IDs, table IDs, record IDs and field names may be 64 characters \ 
(increased from 32 characters).  Before taking advantage of the new size limits \ 
ensure your application is fully upgraded to SDKs with this support.
- Option to `include_media_info` has been added to `DropboxClient.metadata()` \ 
and `DropboxClient.delta()`.

Changes in 2.0.0 (2013-12-19)
-----------------------------
- Add the Datastore API.
- Upgrade OAuth 1 tokens with `DropboxClient.create_oauth2_access_token` and \ 
`DropboxClient.disable_oauth2_access_token`.
- `DropboxClient.thumbnail()`: Fix `size` identifiers.
- `DropboxClient.delta()`: Add support for `path_prefix` parameter.
- Connection reuse/pooling using urllib3.
- Updated SSL settings.
- Various documentation reformatting.

Changes in 1.6 (2013-07-07)
----------------
- Added OAuth 2 support (use DropboxOAuth2Flow).  OAuth 1 still works.
- Added a Flask-based example.
- Fixed many minor bugs.

Changes in 1.5.1 (2012-8-20)
-----------------
- Fixed packaging.
- Got rid of debug prints.

Changes in 1.5 (2012-8-15)
--------------------------
- Support for uploading large files via /chunked_upload

Changes in 1.4.1 (2012-5-16)
----------------------------
- Increase metadata() file list limit to 25,000 (used to be 10,000).
- Removed debug prints from search() call.  Oops.
- Cleanup to make more compatible with Python 3.

Changes in 1.4 (2012-3-26)
--------------------------
- Add support for the /delta API.
- Add support for the "copy ref" API.

Changes in 1.3 (2012-1-11)
--------------------------
- Adds a method to the SDK that returns the file metadata when downloading a
  file or its thumbnail.
- Validate server's SSL certificate against CAs in included certificate file.

Changes in 1.2 (2011-10-17)
---------------------------
- Fixes for bugs found during beta period
- Improved README to include steps to remove the v0 SDK if upgrading

Changes in 1.1 (2011-8-16)
--------------------------
- Fixed version number
- Updated CHANGELOG to be more detailed

Changes in 1.0 (2011-7-11)
--------------------------
- Backwards compatibility broken
   - Completely removed 'callback' and 'status\_in\_response' parameters
   - Change 'sandbox' references to 'app\_folder'
   - Refactored auth.py and renamed it session.py
- Updated SDK to Dropbox API Version 1, supporting all calls
   - Added 'rev' parameter to metadata and get\_file
   - Added 'parent\_rev' parameter to put\_file
   - Added search, share, media, revisions, and restore
   - put\_file uses /files\_put instead of multipart POST and now takes a full path
   - Removed methods for calls that were removed from v1 of the REST API
- Removed 'root' input parameter for all calls
- Changed return format for calls
   - On error (non-200 response), an exception is raised
   - On success, the JSON is parsed and a Python dict or list is returned
- Updated examples
   - Renamed 'bin' directory to 'example'
   - Heavily tweaked the CLI example
   - Added a web app example
- Removed reliance on config files
- Assorted bugfixes and improvements
   - Buffers large file uploads better in put\_file
   - Improved path normalization
- All calls are now made over SSL
- Fully documented code for Pydoc generation
- Added a CHANGELOG
- Changed the distribution name from 'dropbox-client' to 'dropbox-python-sdk'