Drop unused http-client Response::getBody()
Merge branch '0.4' into drop-get-body

* 0.4:
  Move to 0.4.0 section in CHANGELOG
  Remove PHP 5.3 from travis builds
  Remove $that craziness from SecureConnector
  Add 5.4 to CHANGELOG
  Remove horribly annoying 5.3 StreamInterface extends bug
  Clean up annoying 5.3 $that = $this
  Require PHP 5.4.0 as a minimum

Conflicts:
	CHANGELOG.md
Merge pull request #185 from reactphp/drop-get-body

Drop unused http-client Response::getBody()