v0.3.0 — First Heroku deployment

• Respond to undecodable "Depth" header values with a 400 response instead of acting like no value was specified
• Improve logging:
  • Log a message before & after each HTTP request made to the Dandi Archive, to datasets.datalad.org, or to S3 when determining a bucket's region
  • Emit logs on stderr instead of stdout
  • Disable log coloration when stderr is not a terminal
  • Suppress noisy & irrelevant log messages from various dependencies
  • Log errors that cause 404 and 500 responses
  • Use local timezone offset for log timestamps
• Added breadcrumbs to HTML views of collections
• FAST_NOT_EXIST components are now checked for case-insensitively
• Add links to version & asset metadata to the web view
• Adjust the format of timestamps in the web view: Always use UTC, show the timezone as "Z", prevent line breaking in the middle, wrap in <time> tag
• Format sizes in the web view in "1.23 MiB" style
• Zarr entries under /zarrs/ are now served with ".zarr" extensions
• Use <thead> and <tbody> in collection tables in web view
• Add --prefer-s3-redirects option for redirecting requests for blob assets directly to S3 instead of to Archive URLs that redirect to signed S3 URLs