List of posts is support multiple vocabs.

#2328 
![edit-list-of-widget](https://f.cloud.github.com/assets/1222368/803363/100e57d2-edef-11e2-9183-fbdd35d154b0.png)
![list of widget rendered](https://f.cloud.github.com/assets/1222368/803362/100e3c0c-edef-11e2-9f33-cba9371f5760.png)