Intermediate mode for Spline/Bezier patch

Probably we can do more to optimize intermediate and high quality modes here.

-Low
![uces00116_00004](https://cloud.githubusercontent.com/assets/3000282/2800744/7d1e92ac-cc78-11e3-989d-31aa3637dcb6.jpg)

-intermediate
![uces00116_00003](https://cloud.githubusercontent.com/assets/3000282/2800745/816bb9fc-cc78-11e3-8f20-03365c6a972d.jpg)

-High
![uces00116_00002](https://cloud.githubusercontent.com/assets/3000282/2800746/8c292c58-cc78-11e3-9b4b-9bc7c585f100.jpg)