Combinations, final room, new item, new puzzle, death scenario, fixed bug.

* can combine tubed space suit with oxygen tank to make oxygen enhanced
space suit.
* created wing of the spaceship, added description.
* created antenna on wing of the ship, added description.
* created death scenario for trying to exit ship without oxygen
enhanced space suit.
* solved bug where text in textbook wouldn't change after examining
engine.
* improved combining function
* added puzzle involving using a scalpel as a lockpick