Reorganize Preferences Page

[cguess]

The current preferences page is pretty badly. It's ugly, it's a "catchall." Every organization, and especially every CMS has a different requirement. This should be swappable in the views based on CMS.

Let's test is with SNWorks first (since I'm working on it already).

The following is what I want to do:

1. Create a blank setting page
2. Set it up so new view is only shown for SNWorks (dont' want to break anything)
3. Partial for Categories
4. Add a new blank field
5. Add ability to add multiple new fields
6. Allow Free typing of categories
7. Use the SNWorks API to check that each tag exists
8. Error if a tag doesn't exist
9. Save each tag, creating new if it's not in the db, then update by order.