[WIP] Crafting screen subcategories

Got the tabs set up. Doesn't functionally do anything yet.

Any ideas or suggestions for category types let me know.


Some screens:

![cataclysm dark days ahead - 0 9-999-gbc6932b-dirty_004](https://f.cloud.github.com/assets/4959959/1681698/7fa84610-5d99-11e3-91e6-78ee616919a1.png)

![cataclysm dark days ahead - 0 9-999-gbc6932b-dirty_010](https://f.cloud.github.com/assets/4959959/1681701/87dcf1aa-5d99-11e3-9d6d-500a966ecb46.png)