artist urls: add /artist_urls index page.

app/controllers/artist_urls_controller.rb

@@ -1,6 +1,14 @@
 class ArtistUrlsController < ApplicationController
-  respond_to :json
-  before_action :member_only
+  respond_to :json, :xml, :html
+  before_action :member_only, except: [:index]
+
+  def index
+    @artist_urls = ArtistUrl.includes(:artist).search(search_params).paginate(params[:page], :limit => params[:limit], :search_count => params[:search])
+    respond_with(@artist_urls) do |format|
+      format.json { render json: @artist_urls.to_json(include: "artist",) }
+      format.xml { render xml: @artist_urls.to_xml(include: "artist", root: "artist-urls") }
+    end
+  end
 
   def update
     @artist_url = ArtistUrl.find(params[:id])