Auto generated stub codes for interface

Press Ctrl+Shift+1 then auto generate interface file.
It would be nice if it generates all related inherited interface functions. 


![screen shot 2014-07-17 at 11 58 48 pm](https://cloud.githubusercontent.com/assets/1762095/3617435/636f4c8c-0dde-11e4-8a90-96e5d3af8ace.png)
![screen shot 2014-07-17 at 11 59 23 pm](https://cloud.githubusercontent.com/assets/1762095/3617437/686741c2-0dde-11e4-8f73-bc031bbf9c61.png)