- Version inspection API endpoint. Allows checking the version of ins…

…tances programmatically.

- Deployment now handled in straight docker (add docker compose to maintain sanity). Dokku support has been removed as it was a PITA.
- Link for medical form updated to use correct website (http://www.ukdmc.org), they appear to have lost control of their previous domain.

- Instructor qualification 'setter' on trainee notes view. All qualifications go through the 'Award New Qualification' form.

Release v0.5.3

Release v0.5.2

Merge branch 'hotfix/geoposition-field'