freezebase 0.4.0

Added

• HTTPDownloader.close() and context-manager support, which close the
  downloader's session and release its pooled connections. Creating one
  downloader per download previously held a connection open until the garbage
  collector ran, which made downstream test suites fail unpredictably. The
  session is also closed on garbage collection as a fallback.

Changed

• Breaking: HTTPDownloader no longer forwards arbitrary keyword arguments
  to requests. method and timeout are now named parameters and are spelled
  exactly as before, so calls that only used those keep working; method is
  restricted to "GET" and "POST". Any other requests keyword, such as
  params or headers, now raises TypeError instead of reaching the request.
  To configure the transport, for example a connection pool size, mount an
  adapter on HTTPDownloader.session.