Derelict tweaks

* Added a sulphuric acid beaker to the Derelict medbay 
* Added a machine frame with a chem dispenser circuitboard and its other parts scattered around it to the Derelict medbay
* Added chem master to Derelict medbay
* Fixed an area in Derelict atmos and then tweaked a few things in the area 

![m1](https://cloud.githubusercontent.com/assets/4912533/2917131/50b8258a-d6c2-11e3-8b11-367a33e8b6f1.png)
![m2](https://cloud.githubusercontent.com/assets/4912533/2917136/616f83c8-d6c2-11e3-814d-8e629e915a26.png)