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

#217, #138

![screen shot 2014-02-18 at 10 05 50 am](https://f.cloud.github.com/assets/2622152/2192982/910b205c-9873-11e3-945d-9917dd50478c.png)
![screenshot 2014 02 18 10 05 41](https://f.cloud.github.com/assets/2622152/2192983/91106a62-9873-11e3-8e4e-0114d80c7968.png)
![screenshot 2014 02 18 10 05 34](https://f.cloud.github.com/assets/2622152/2192984/912f4cd4-9873-11e3-96d3-f8bd40ebb03d.png)
![screenshot 2014 02 18 09 57 16](https://f.cloud.github.com/assets/2622152/2192985/9142c2fa-9873-11e3-8591-05843105a3ae.png)