Replace search widget with SearchView

Happy to present the first cool Action Bar related change!
![searchview](https://cloud.githubusercontent.com/assets/527708/2640205/149c352c-bee0-11e3-81f9-c624e332eb36.png)
![searchview1](https://cloud.githubusercontent.com/assets/527708/2640206/1651f2d0-bee0-11e3-92e2-17b4d54c05a4.png)