NanoUI Gas Cooling/Heating System

* Created Nano UIs for the Gas Cooling System and Gas Heating System
* Standardized the reference structure for procs (they now use use full paths, instead of relative)
* Standardized the names of each machine ("gas cooling system" and "gas heating system") for both the object and the UI title

![nanoui - gas cooling system](https://f.cloud.github.com/assets/2864209/1994150/77cb4df0-84e7-11e3-80f8-338fc4cf3167.png)
![nanoui - gas heating system](https://f.cloud.github.com/assets/2864209/1994151/77cbbb96-84e7-11e3-9973-fc44bedd252f.png)