Add category to rake new_post

Rakefile.rb

@@ -25,6 +25,7 @@ task :new_post, :title do |t, args|
   if File.exist?(filename)
     abort("rake aborted!") if ask("#{filename} already exists. Do you want to overwrite?", ['y', 'n']) == 'n'
   end
+  category = get_stdin("Enter category name to group your post in (leave blank for none): ")
   tags = get_stdin("Enter tags to classify your post (comma separated): ")
   puts "Creating new post: #{filename}"
   open(filename, 'w') do |post|
@@ -32,6 +33,7 @@ task :new_post, :title do |t, args|
     post.puts "layout: post"
     post.puts "title: \"#{title.gsub(/&/,'&')}\""
     post.puts "modified: #{Time.now.strftime('%Y-%m-%d %H:%M:%S %z')}"
+    post.puts "category: [#{category}]"
     post.puts "tags: [#{tags}]"
     post.puts "image:"
     post.puts "  feature: "