added new landing page

app/views/landings/_image.html.erb

@@ -0,0 +1 @@
+<div class="landing-post"><a href="<%= post_path(post) %>"><img src="<%= post.medium_file_url %>" width="<%= post.medium_image_width %>" height="<%= post.medium_image_height %>"><div class="data"><p><%= post.essential_tag_string %></p></div></a></div>

app/views/landings/_tag.html.erb

@@ -0,0 +1,8 @@
+<!-- 
+- tag
+ -->
+<div>
+  <% @explorer.search(tag, 300).each do |post| %>
+    <%= post.presenter.medium_image_html(self, :max_height => 300) %>
+  <% end %>
+</div>

app/views/landings/show.html.erb

@@ -0,0 +1,22 @@
+<div id="c-landings">
+  <div id="a-show">
+    <h1><%= link_to Danbooru.config.app_name, posts_path %></h1>
+    <p class="slogan">Find good art fast</p>
+    
+    <div class="column">
+      <% @explorer.col1.each do |post| %>
+        <%= render "image", :post => post %>
+      <% end %>
+    </div>
+
+    <div class="column">
+      <% @explorer.col2.each do |post| %>
+        <%= render "image", :post => post %>
+      <% end %>
+    </div>
+  </div>
+</div>
+
+<% content_for(:page_title) do %>
+  <%= Danbooru.config.app_name %>
+<% end %>