FuelDepot structure changes

Mass now tied to construction costs
Food per Fuel ratio now static
Fuel storage capacity lowered
indentation / formatting
updated govs for Farming and Research

destruct mine loops fixed
updated cargobay selection
gov_efficiency used in max mines allowed
Farming Gov tweaks

added to AI allowed list
fuel depots quota now tied to food production
formatting / indentation
formatting / indentation pt 2
Merge remote-tracking branch 'origin/dev'
Merge remote-tracking branch 'origin/dev'