Modify UI to be consistent with iphone/ipad, add more features related to navigation

This feature accomplishes:

1) On iPhone we now have access to Guides/More-info/Answers while drilling down categories. A new "Guides" section will pop up in the tableview if there are guides for a given category you are currently looking at.

2) Moved Favorites button to top right of view

3) On iPad: While the user is drilling down categories, we update the right hand side of the split view controller based on a priority system:
 * Guides are most important, show this first if available.
 * Answers is second important, show this if Guides aren't available
 * More info is the least important, show if Guides/Answers isn't available.

4) We now use the content section of a categories wiki by grabbing it from the API and applying local custom CSS.

5) Moved a couple classes to deprecated folder as we no longer need to use them with this new functionality.


TODO:
1) Finalize the CSS for iPad/iPhone
2) Find bugs
3) Rebase once this pull is ready before merging
4) Figure out what to do with portrait mode, keep it? Remove it?
5) Add image to tabbar items