Add position, size, style and zoom configuration according devices.

#23

![screenshot 2014 02 18 10 51 54](https://f.cloud.github.com/assets/2622152/2193255/00049d34-987a-11e3-903c-ed34d0ad014e.png)
![screenshot 2014 02 18 10 50 49](https://f.cloud.github.com/assets/2622152/2193256/0006ca50-987a-11e3-9de2-4717126469ec.png)
![screen shot 2014-02-18 at 10 50 14 am](https://f.cloud.github.com/assets/2622152/2193257/000ab200-987a-11e3-82f3-0d15f764de40.png)