v0.11.3

Added

• ServerPool now supports a task_delay argument that enforces
  a minimum time interval between assigning any two tasks to any
  one worker. This can be passed directly to dependent methods such as
  aws.ec2.Cluster.commandmap().
• aws.s3.Bucket now supports simple bucket tag access and management.
  Tags may be set by passing kwargs to the Bucket.set_tags() method,
  and may be inspected as the Bucket.tags attribute.

Changed

• Assorted linting and documentation cleanup

Full Changelog: v0.11.2...v0.11.3