Panels rework

__NOT READY FOR MERGE__ : Will break apps relying on the old panel system.

- New PanelService 
- Depends on the improved angular-ui-router 



__NOT READY FOR MERGE__ : Will break apps relying on the old panel system.


![funniest-simpsons-gifs-homers-barbecue](https://cloud.githubusercontent.com/assets/116530/4215935/e3cbeadc-38d3-11e4-9bb1-9ab0d435da60.gif)