Remove unused named route and merge with marketplace#index
Dynamically set controller name
Add route for listings#index with optional category id
Add ajax call for search and sort on listings index
Change ids of elements that fire ajax search and filter
Add action to handle ajax call, and before filter to set listings
Remove whitespace
Add helper method to set path in marketplace nav
Add instance method to filter listings
Use helper method to set correct path
Add route for listings ajax sort, rename marketplace ajax sort
Add view to handle ajax call