Add AWS Actors docs.
Fake AWS creds for unit tests.
Improve docs, tidy up aws tests.
Merge pull request #38 from Nextdoor/aws_actor_docs

Add AWS Actors docs.
Merge pull request #39 from Nextdoor/minor_fixes

Improve docs, tidy up aws tests.
Replace self._log() with a LoggerAdapter.
Pep8
Flakes
Merge pull request #40 from Nextdoor/fix_logging

Replace self._log() with a LoggerAdapter.
Merge branch 'master' of github.com:Nextdoor/kingpin into populate_with_env
Cleaner logging, and remove unnecessary import warning.