Add blank admin endpoint.
Admin: Handle user registration, login & logout. Add custom index page.
Add admin user.
Fix #10. Enable User management through Admin interface.
Closes #48. Manage Benchmark Prices through Admin interface.
Bugfix: capture currency relations while rebuilding db. Improve unicode representation of Products and Medicines.
Close #42. Manage Procurement entries through Admin interface.
Merge branch 'admin' into develop
Config: locat database with absolute path.