Change category titles to lowercase, single words; remove romance category.
Apply changed category names to icon view helper method and add method to display title in certain ways to user.
Update directionality_category? method to reflect changed category names.
Add route and controller action to allow filtering posts index view by category.
Make changes to limit searching to the specified category when in a category posts index view.
Revert back to a single view doc for posts index, the other views having seemed to be necessary to manage the different searching--but realizing that Ransack default submits to the index action, and having modified that to search within a specified category, the other views are not needed.