Changelog for 0.9.2

This is a maintenance release.

- Update static assets to their latest versions
  (Patternfly, Flask, etc.)
- The location of the callback has been changed from
  ara/callback to ara/plugins/callbacks/. The previous
  location has been deprecated and will be removed in
  a future version.
- Bugfix: The home link in the navigation now behaves
  more as expected and redirect to the root of the web
  application rather than the root of the domain or
  filesystem.
- Misc: Integration test coverage improvements