Modify typescriptRef RegExp

Hi, I'd like to have vim highlight like the image.
![93bb2a303c579c16b5b2ea9829654da8](https://f.cloud.github.com/assets/1025342/920946/e1b138c6-fee9-11e2-8a5e-f2b50228c590.png)

Could you review it?
Thanks.