Fixes
- Version 0.6.0 was accidentally tagged at the wrong (broken) point in history,
which included a broken fix for removing the `id` prefix from entities
([48](https://github.com/everypolitician/everypolitician-popolo/pull/48)),
but not the pull request reverting that change
([49](https://github.com/everypolitician/everypolitician-popolo/pull/49)).
0.6.0 has been yanked from RubyGems and we recommend using version 0.6.1.