Release date: 7/30/18
* Add more competitions list options
* Add more datasets list options
* Add a couple more fields to kernels list display
* Add support for kernel and dataset ID's
* Allow generating metadata for an existing dataset
* Fix issue with downloading from datasets whose titles don't match their slugs
* Use kernel slug as filename for kernel output
* Make upload and download directory default to current working directory
* Use a default username on downloading kernel or dataset data if none is specified
* Support extended data types on datasets
* Stop requiring `-c`, `-d`, and `-k` arguments
* Don't require `resources` field in dataset metadata