Don't need sampel
Whitespace
Write 0.4.0 updater

* Move updater run into class
* Write upgrade code for 0.4.0 with tests
* Activate plugin in test bootstrap
Upgrade travis to cover one version behind
Fix travis settings
Update post_type to gistpen and migrate gistpens
Merge branch 'feature/040-updater' into develop

* feature/040-updater:
  Update post_type to gistpen and migrate gistpens
  Fix travis settings
  Upgrade travis to cover one version behind
  Write 0.4.0 updater
  Whitespace
  Don't need sampel