Add support for slim templating language (because I love it)

features/slim.feature

@@ -0,0 +1,7 @@
+Feature: Support slim templating language
+  In order to offer an alternative to Haml
+
+  Scenario: Rendering Slim
+    Given the Server is running
+    When I go to "/slim.html"
+    Then I should see "<h1>Welcome to Slim</h1>"

fixtures/test-app/config.rb

@@ -2,6 +2,7 @@ with_layout false do
   page "/inline-css.html"
   page "/inline-js.html"
   page "/inline-coffeescript.html"
+  page "/slim.html"
 end
 
 get "/page-class.html" do

fixtures/test-app/source/slim.html.slim

@@ -0,0 +1,7 @@
+doctype 5
+html lang='en'
+  head
+    meta charset="utf-8"
+    
+  body
+    h1 Welcome to Slim

lib/middleman.rb

@@ -67,6 +67,7 @@ module Middleman
   module Renderers
     autoload :Haml, "middleman/renderers/haml"
     autoload :Sass, "middleman/renderers/sass"
+    autoload :Slim, "middleman/renderers/slim"
   end
 
   # Features API

lib/middleman/renderers/slim.rb

@@ -0,0 +1,12 @@
+module Middleman
+  module Renderers
+    module Slim
+      class << self
+        def registered(app)
+          require "slim"
+        end
+        alias :included :registered
+      end
+    end
+  end
+end

lib/middleman/server.rb

@@ -73,6 +73,7 @@ module Middleman
     end
     
     # Activate custom renderers
+    register Middleman::Renderers::Slim
     register Middleman::Renderers::Haml
     register Middleman::Renderers::Sass
     

middleman.gemspec

@@ -29,6 +29,7 @@ Gem::Specification.new do |s|
   s.add_runtime_dependency("padrino-helpers", ["~> 0.9.23"])
   s.add_runtime_dependency("rack-test", ["~> 0.5.0"])
   s.add_runtime_dependency("uglifier", ["~> 0.5.0"])
+  s.add_runtime_dependency("slim", ["~> 0.9.4"])
   s.add_runtime_dependency("haml", ["~> 3.1.0"])
   s.add_runtime_dependency("coffee-filter", ["~> 0.1.0"])
   s.add_runtime_dependency("sass", ["~> 3.1.0"])