Quilt

Python API
- Bug-fixes for `quilt3.config` and `quilt3.catalog`
- Performance improvements for Packages

Catalog
- Updated landing page

Catalog
* New `LOCAL` mode for running the catalog on localhost

Python API
* `quilt3 catalog` command to run the Quilt catalog on your local machine
* `quilt3 verify` compares the state of a directory to the contents of a package version
* Added a local file cache for installed packages
* Performance improvements for upload and download
* Support for short hashes to identify package versions
* Adding telemetry for API calls

API Improvements
- Implement Package.rollback
- Drop support for object metadata (outside of packages)
- Change the number of threads used when installing and pushing from 4 to 10 (S3 default)
- Misc bug fixes

Catalog
* Fix package listing for packages with more 100 revisions
* Add stacked area charts for downloads
* 2-level file-extensions for bucket summary

Python
* Fix uploads of very large files
* Remove unnecessary copying during push

* [`delete_package`](https://docs.quiltdata.com/api-reference/api#delete\_package) for a specific version via `top_hash=`

- Bug fix: when adding python objects to a package a temporary file would be created and then deleted when the object was pushed, leading to a crash if you tried to push that package again (PR 1264)