Added migrations and models
Aircraft fixes for flights
Airport and dep/arr time fixes

Departure and arrival time are now automatically part of the Carbon
class.
Airline migration fixes
Seed files

For aircraft, airlines, airports, countries and registrations
Created Artisan command for inserting data about flights into database
Added easy access for duration field on Flight
Merge pull request #1 from bonroyage/datafetcher

Datafetcher
Extract aircraft code from full code
Removed seed files in favour of raw sql files
Added airport country codes to flights
Merge commit '1358ca68fe3cacd17c9e930bb441f95c9d9494bf'
Updated vatsim fetcher and migrations
Merge pull request #5 from bonroyage/master

Migrations and seeds