Re-introducing IratePirate's PR

Since IratePirate's PR has reached a block, I'm redoing the most
common-sense changes and including an extra thing or two :

- Add in missing cameras to latest changes. I hope I got them all
- Fix broken conveyor belt corner in Cargo
- Fix some of the wires and pipes under walls, notably near Cargo and by the vending machines near HoP Office
- Switch the General Fabricator windoor so that Mechanics get to control who accesses it, but can still make it public at a moment's notice
- Add Air Alarm to Viro Access
- Added in some reinforced tables to Perma to make prisoner escape a bit harder. You can no longer pillage Execution and unless someone snuck in a welder you won't be able to pull off the Perma hallway strategy since reinforced tables are now in the way. Pull something more intricate or serve your sentence

This picture might or might not be related, who knows : 

![an image](https://cloud.githubusercontent.com/assets/6137403/5023748/a7b88d36-6afe-11e4-982c-33cf6a7da5a3.png)