v0.7.1:
  date: 2015-07-10
  changes:
    - Handle code 'null' in spawn code
v0.7.0:
  date: 2015-02-20
  changes:
    - Bump `phantomjs` dependency.
    - Add a handler for `phantom.onError`.
    - Check for a pid rather than connected property of process before killing it.
v0.6.0:
  date: 2014-03-28
  changes:
    - Allow "spawn" to be called without options.
    - Kill spawned phantomjs process on cleanup() in case something is keeping it open.
    - Added option for screenshots.
v0.5.0:
  date: 2014-01-17
  changes:
    - /41 /49 merged
v0.4.0:
  date: 2013-09-02
  changes:
    - removed phantom.exit on failures after first load /24 /18
    - return full request object for debugging /34
v0.3.0:
  date: 2013-04-03
  changes:
    - bumped phantomjs to 1.9.0-1
v0.1.0:
  date: 2012-10-05
  changes:
    - Work in progress.
