Reworded text slightly for the Drinking Aristocrat mission.
* system.adjacentSystems() should not return systems whose jumps are hidden or exit-only.
* Corrected an insubstantial redundant data retrieval.
* Set exclusive and required flags on core slots.
Merge commit '189ee1c2988f8314882531195217358340b87f7a'
changed order of equip_cores to equip system core first, to prevent negative cpu bug
* If the black trinity escorts die, shouldn't blow up anymore.
* libbfd needs -lz.
* Fixed crash in release mode.