Kaggle

* Remove Swagger. No user-visible changes to the command-line tool. However, projects that
use `kaggle/api/kaggle_api.py` may be affected. That file is deprecated and will be removed.
Most of it functions still work, but those that involve uploading files no longer work.
The command-line tool uses a higher-level abstraction for uploading and client code needs
to be converted to use that.

* No changes; release 1.6.16 did not complete.

* No changes; release 1.6.15 isn't usable. We're working on process updates to prevent this from happening again.

* Support XDG base directory specification on Linux
* Disable out-of-date API version warning with -W
* Allow an array of strings in "source" when uploading .ipynb files (thanks to GitHub user mgallifrey for the contribution!)
* Add triton framework for models
* Update model licenses

* No changes; release 1.6.13 isn't usable.

* Add --page-size and --page-token CLI options to all commands that display lists of files.