Various GUI Improvements

In addition to the new controls for logging output, I also increased the stretch value for the servo controls, increasing their vertical space when the user expands the window vertically. This could be potentially unwanted behavior if the relay buttons need to be really big. On the other hand, it gives more precise control to the servo's with less vertical space.

The new GUI changes result in this:

![image](https://f.cloud.github.com/assets/4673087/839169/bfa3b616-f339-11e2-9bb1-ee399693eabe.png)

The buttons are still fairly sized with more vertical space: 

![image](https://f.cloud.github.com/assets/4673087/839178/05251ff4-f33a-11e2-8e2e-9305343354e9.png)

In future commits, perhaps the stretch should be more finely-tuned, based on feedback. I also add a note that could serve as a reminder to eventually change the domain if needed.