Runtime fixes and flavour text

Fixes the runtimes for airlocks and laptop vending machines.

Fixes the Security Computer Sprite (credit to Icecream&Honey)

Hopefully causes old flavour texts to be not-lost.
Typo

Whoops
Merge pull request #191 from Askarn/master

Runtime fixes and flavour text
Merge pull request #5 from HypatiaStation/master

Pulling from master