only show latest active jobs within 30 days
use expires_at for latest active jobs
add expired job fixture
This refactoring has several benefits over the previous code:
    The logic to get the active jobs is now in the Model, where it belongs
    The code in the controller is thinner and much more readable
    The getActiveJobs() method is re-usable (for instance in another action)
    The model code is now unit testable
add Categories on the Homepage
Limit the results
Custom Configuration parameters
Dinamic Fixtures
Secure the Job Page - don't show expired job
Merge branch 'feature/day6' into develop