Route improvements and bug fixes

Greenland and The Dardanelles

• Upernavik port (Greenland) is now reachable.
• routes in The Dardanelles improved : Alexadroupoli (GR) and Karabiga ports are reachable.
• Suez Canal restrictions have been updated (max beam set to 77.5 meters).

CO2 emissions :

• CO2 emissions are rounded (were truncated) for a better accuracy.
• When origin and destination are the same, CO2 emissions for AIR mode are 0.