SVG icons for zoom related icons

![qq](https://f.cloud.github.com/assets/127259/796405/b97e66fc-ed24-11e2-90a6-b9919a54f8cf.png)

The redraw icon has been redrawn:
![1-redraw](https://f.cloud.github.com/assets/127259/796399/73e5c810-ed24-11e2-9a5d-391b9cf33790.png)