Bdm create and show categories

![image](https://cloud.githubusercontent.com/assets/8669803/4979293/03cf7b76-68f6-11e4-8a40-788c5235c529.png)

![image](https://cloud.githubusercontent.com/assets/8669803/4979299/0fe62090-68f6-11e4-8c2e-ee46fb87dfe9.png)

Once we allow admins to create new categories via the webpage, we'll still want them to redirect to CatIndex on failure