Black System Tray Icon

I have added a 2nd option choice, along with a preference pain option to either have color or black icon.

http://screencast.com/t/8WccIzOW5Lp

I'm pretty happy with the simplicity and ease I was able to add this. Not sure if it was a requested feature, but I'm excited to have all my system tray icons back to black. 

![2013-02-04_1914](https://f.cloud.github.com/assets/2095566/126130/dae4bc2e-6f39-11e2-8100-30f987300516.png)

Thanks for the great work on Hermes.
Brad

P.S. This is my first attempt at a pull request if I did anything wrong, let me know.