0.12.5rc1

0.12.5 is a small maintenance release.

Changelog:
- Fix encoding/decoding issues when using non-ascii characters
  in playbooks and improve integration testing for this kind of
  problem.
- The full playbook path is no longer printed in the table.
  The playbook path turned out to be too long and truncated most of
  the time. Only the file name is shown now. The full path is still
  available in the tooltip when hovering over the playbook file name.
- Improved performance for the reports page, especially when viewing
  playbook runs with a larger amount of data.