Pyuploadcare

- Update bundled widget to version `3.3.0`. See [widget changelog](https://github.com/uploadcare/uploadcare-widget/blob/master/HISTORY.markdown).
- Update links to the Uploadcare site
- Expand data format in 'User-Agent' request header.

- Change data format in 'User-Agent' request header.

- Update default widget version to `3.x`
- Update bundled widget to version `3.2.3`. See [widget changelog](https://github.com/uploadcare/uploadcare-widget/blob/master/HISTORY.markdown).

- Add support for Django versions 1.11 and \~2.0
- Miscellaneous updates (version, year in a license file, tox
configuration and etc.)
- Drop official support for obsolete Python and Django versions.
Chances are that everything still works. If you have to use those,
modify `tox.ini`, run tests and use at
your own risk ;) Or, you may use older versions of the library.

- Add `file.create_local_copy` and `file.create_remote_copy` methods.
- Add new `make_public` and `pattern` parameters to
file.create\_remote\_copy method.
- Add new `store` parameter to file.create\_local\_copy methods.
- Update CDN link to the widget.
- Use wildcard `2.x` to always get the latest patch or minor version
of widget version `2`. See [widget changelog](https://github.com/uploadcare/uploadcare-widget/blob/master/HISTORY.markdown).
- Update bundled widget to version `2.10.3`. See [widget changelog](https://github.com/uploadcare/uploadcare-widget/blob/master/HISTORY.markdown).

- Support auto storing in upload requests
- Updated widget to version 2.10.0 (see [widget changelog](https://github.com/uploadcare/uploadcare-widget/blob/master/HISTORY.markdown)).
- Drop support for Python 3.2
- Simplify and reduce test matrix in `.travis.yml`