IA Pages Index - add searchbar

@russellholt @jagtalon [Screencast](http://gfycat.com/InformalPalatableAphid#)

Screenshot:
![screen shot 2014-12-03 at 13 22 45](https://cloud.githubusercontent.com/assets/3652195/5453418/50f14f5e-8527-11e4-9222-9c1200a0d935.png)