Implement Shuttles

[Gvin]

Implement small shuttles that can be piloted by player. It should be entities.
These shuttles can be used by players as docking replacement (just jump close to the station and then use shuttle to land in station's hangar.
Shuttles should have the following slots:

• Energy cell (slot for big energy cell used to power the shuttle).
• Armor plates (define shuttle health).
• Weapon

Possibly replace shuttle entity with block upon player leaving shuttle.

Test that shuttle docked inside the ship teleports with it upon jumping.