* Add support for organizing Redirects into categories
* Create custom hierarchical taxonomy 'redirect_category' to allow categorizing redirects. This is extremely helpful when sites have a large number of redirects.
* Change menu name from "Category" to "Categories"
* This keeps things in align with the wording of 'Categories' in the default Posts menu
Merge pull request #1 from raamdev/000000-dev

* Add support for organizing Redirects into categories