add mock recommender service for development, add user-context recommended posts

app/views/recommended_posts/show.html.erb

@@ -0,0 +1,15 @@
+<div id="c-posts">
+  <div id="a-index">
+    <h1>Recommended Posts</h1>
+
+    <p>Based on your voting history, you may enjoy these posts. Vote more to get more accurate results. These recommendations update every hour.</p>
+
+    <%= render partial: "show" %> 
+  </div>
+</div>
+
+<%= render "posts/partials/common/secondary_links" %>
+
+<% content_for(:page_title) do %>
+  Recommended Posts - <%= Danbooru.config.app_name %>
+<% end %>