add gesture support for mobile page

app/assets/javascripts/mobile.js

@@ -0,0 +1,7 @@
+//= require jquery-1.10.1.min.js
+//= require hammer.min.js
+//= require jquery.hammer.min.js
+
+$(function() {
+  $(document).hammer();
+});

app/views/mobile/posts/index.html.erb

@@ -9,4 +9,27 @@
 
 <%= content_for(:html_header) do %>
   <meta name="viewport" content="width=device-width,initial-scale=1">
+  <script type="text/javascript">
+  	$(function() {
+      $(document).on("swipeleft", function() {
+        var href = $(".paginator a[rel=next]").attr("href");
+        if (href) {
+          window.location = href;
+        }
+      });
+
+      $(document).on("swiperight", function() {
+        var href = $(".paginator a[rel=prev]").attr("href");
+        if (href) {
+          window.location = href;
+        }
+      })
+  	});
+  </script>
+<% end %>
+
+<% if @post_set.tag_string.present? %>
+  <%= @post_set.humanized_tag_string %> - <%= Danbooru.config.app_name %>
+<% else %>
+  <%= Danbooru.config.app_name %>
 <% end %>

app/views/mobile/posts/show.html.erb

@@ -11,4 +11,22 @@
 
 <%= content_for(:html_header) do %>
   <meta name="viewport" content="width=device-width,initial-scale=<%= @post.device_scale %>">
+  <script type="text/javascript">
+    $(function() {
+      $(document).on("swipeleft", function() {
+        var href = $(".paginator a[rel=next]").attr("href");
+        if (href) {
+          window.location = href;
+        }
+      });
+
+      $(document).on("swiperight", function() {
+        window.history.back();
+      })
+    });
+  </script>
+<% end %>
+
+<% content_for(:page_title) do %>
+  <%= @post.presenter.humanized_essential_tag_string %> - <%= Danbooru.config.app_name %>
 <% end %>