Remove our categorization hack, and add category view pages instead.

_plugins/auto_categories.rb

@@ -1,9 +0,0 @@
-# Very simple plugin that adds a subdirectory under _posts as a category
-
-def get_category_from_subdir(path)
-  path.sub(/^.*_posts\/(.*?)\/.*$/, "\\1")
-end
-
-Jekyll::Hooks.register :posts, :pre_render do |post, payload|
-  post.data['categories'] << get_category_from_subdir(post.path)
-end

_plugins/category_page.rb

@@ -0,0 +1,30 @@
+class CategoryPage < Jekyll::Page
+  def initialize(site, base, dir, category)
+    @site = site
+    @base = base
+    @dir = dir
+    @name = 'index.html'
+    
+    self.process(@name)
+    self.read_yaml(File.join(base, '_layouts'), 'category_index.html')
+    self.data['category'] = category
+
+    category_title = site.config['category_titles'][category] || category.capitalize
+    self.data['title'] = "#{category_title}"
+  end
+end
+
+class CategoryPageGenerator < Jekyll::Generator
+  safe true
+
+  def generate(site)
+    if !site.layouts.key? 'category_index'
+      return
+    end
+
+    site.categories.each_key do |category|
+      site.pages << CategoryPage.new(site, site.source, category, category)
+    end
+  end
+  
+end