make sure chained templates work with data

features/chained_templates.feature

@@ -0,0 +1,9 @@
+Feature: Templates should be chainable
+  In order to insert variables and data in "static" engines
+
+  Scenario: Data in Erb in Markdown
+    Given the Server is running at "chained-app"
+    When I go to "/index.html"
+    Then I should see "Title</h1>"
+    And I should see "Subtitle</h2>"
+    And I should see "Sup</h3>"

fixtures/chained-app/data/article.yml

@@ -0,0 +1,2 @@
+title: "Title"
+subtitle: "Subtitle"

fixtures/chained-app/source/index.html.markdown.erb

@@ -0,0 +1,8 @@
+---
+layout: false
+sup: "Sup"
+---
+
+# <%= data.article.title %>
+## <%= data.article.subtitle %>
+### <%= data.page.sup %>

lib/middleman/core_extensions/rendering.rb

@@ -40,8 +40,12 @@ module Middleman::CoreExtensions::Rendering
 
       @current_engine, engine_was = engine, @current_engine
       @_out_buf, _buf_was = "", @_out_buf
-    
-      content = render_individual_file(path, locs, opts)
+      
+      while ::Tilt[path]
+        content = render_individual_file(path, locs, opts)
+        path = File.basename(path, File.extname(path))
+        cache.set([:raw_template, path], content)
+      end
       
       needs_layout = !%w(.js .css .txt).include?(extension)
       

middleman.gemspec

@@ -34,7 +34,7 @@ Gem::Specification.new do |s|
   s.add_dependency("coffee-script", ["~> 2.2.0"])
   s.add_dependency("execjs", ["~> 1.2.7"])
   s.add_dependency("sprockets", ["~> 2.1.2"])
-  s.add_dependency("sprockets-sass", ["~> 0.3.0"])
+  s.add_dependency("sprockets-sass", ["~> 0.5.0"])
   s.add_dependency("guard", ["~> 0.8.8"])
   
   # OSX