Removal of jump drives

[dcorallo]

In the change log of 2.1 the following breaking changes are listed:

- the following modules have been removed: JUMP_DRIVE_I, JUMP_DRIVE_II, JUMP_DRIVE_III  
- the following waypoint type is now deprecated: ASTEROID_FIELD

In the endpoint's definition these are still valid, at least they are listed in WaypointType and ShipModule.
Also: The Quickstart section still talks about jump drives:

Jumping a ship however is instantaneous, but it requires a jump drive and a unit of antimatter. Jump drives are expensive and rare, but your command ship starts with one.