Configtool About tab update

Updated the layout of the "About" tab to be more similar to that of the newly changed "Recording" tab.

Windows:
![about tab screenshot](https://cloud.githubusercontent.com/assets/5759678/4452270/38c14652-4844-11e4-8349-305fe83ce5a3.jpg)

Linux:
![about tab screenshot](https://cloud.githubusercontent.com/assets/5759678/4452278/56d02d48-4844-11e4-9784-d5827105f247.png)

On my screen, this looks decent:
```python
self.logo.setStyleSheet("QLabel { margin-bottom: 235 pt; margin-left: 110 pt; }")
self.logo.setPixmap(self.logoPixmap.scaledToHeight(80))
```

![image](https://cloud.githubusercontent.com/assets/497458/4465689/9aeded50-48dd-11e4-8392-ba2fc22e1603.png)

The scaling doesn't produce the nicest looking image though, but not sure if it's worth it to add another prescaled image just for the about screen.