Updated icon set

![icons-1](https://f.cloud.github.com/assets/518943/1236440/a922edfe-29c0-11e3-8b79-a4714d3eb1b8.png)

![icons-2](https://f.cloud.github.com/assets/518943/1236442/aa60b62e-29c0-11e3-8227-e8657bd2da2b.png)