Default behavior
================
If clients of whoas library don't have any whoas configuration, the whoas factory will create
InMemoryQueue and SequentialHookRunner

Library Configuration
=====================

The clients of whoas library can add "whoas" configuration to build queue and runner of their choice.
See the example below

whos:
  queueType: "com.github.lookout.whoas.Queue"
  runnerType: "com.github.lookout.whoas.SequentialHookRunner"