added securing your workers to sidebar, modify security group display

![screen shot 2013-10-16 at 6 30 56 pm](https://f.cloud.github.com/assets/1712162/1348580/083cd224-36cc-11e3-8693-648d99555c56.png)
![screen shot 2013-10-16 at 6 31 01 pm](https://f.cloud.github.com/assets/1712162/1348579/083cbd3e-36cc-11e3-95e8-341430c41f2d.png)