controllers/flights: Renamed today() to latest()

We don't show the current date at this page. We show the date of the
latest flights instead.
Merge pull request #33 from Turbo87/today-vs-latest

controllers/flights: Renamed today() to latest()
scripts: Import cleanup
scripts: Use argparse module
shell.py: Fall back to development.ini if production config is missing
daemon.py: Fall back to development.ini
generate_assets.py: Fall back to development.ini
scripts: Fall back to development.ini
Merge pull request #34 from Turbo87/config-defaults

Config file defaults