Closes #94 - Add idempotency to Terminate actor
Mark SQS dry-delete test as idempotent.
Add docs where to find scripts in RightScale UI.

Close #89
Merge pull request #100 from Nextdoor/dont_mock

Closes #94 - Add idempotency to Terminate actor
Merge pull request #108 from Nextdoor/issue_89

Add docs where to find scripts in RightScale UI.
Add Actor defaults and descriptions to options.
Merge pull request #110 from Nextdoor/squashed_defaults

Add Actor defaults and descriptions to options.
Add 'warn_on_failure' option to BaseActor.

This new 'warn_on_failure' option changes the behavior of the BaseActor and
allow for actors to fail, but Kingpin scripts to continue to operate. It
works by returning True regardless of the execution status of the Actors
`_execute()` method.

The option defaults to False (same as previous behavior), and is sanity
checked by the JSON schema file.
Merge pull request #111 from Nextdoor/allow_base_actor_failure

Add 'warn_on_failure' option to BaseActor.
Merge branch 'master' of github.com:Nextdoor/kingpin into fix_launch_actor_with_specific_count