add dedicated intro post set

app/logical/post_sets/intro.rb

@@ -0,0 +1,15 @@
+module PostSets
+  class Intro < PostSets::Post
+    def initialize(tags)
+      super(tags)
+    end
+
+    def posts
+      @posts ||= begin
+        temp = ::Post.tag_match("#{tag_string} fav_count:>3").paginate(page, :search_count => nil, :limit => 6)
+        temp.all
+        temp
+      end
+    end
+  end
+end

app/presenters/intro_presenter.rb

@@ -5,7 +5,7 @@ class IntroPresenter
 
   def each
     popular_tags.each do |tag|
-      yield(tag, PostSets::Post.new(tag, 1, 6))
+      yield(tag, PostSets::Intro.new(tag))
     end
   end
 end