Add stylus support

samples/Ruby/sinatra.rb

@@ -598,6 +598,11 @@ module Sinatra
       render :less, template, options, locals
     end
 
+    def stylus(template, options={}, locals={})
+      options.merge! :layout => false, :default_content_type => :css
+      render :stylus, template, options, locals
+    end
+
     def builder(template=nil, options={}, locals={}, &block)
       options[:default_content_type] = :xml
       render_ruby(:builder, template, options, locals, &block)

samples/Stylus/demo.styl

@@ -0,0 +1,14 @@
+border-radius()
+  -webkit-border-radius arguments
+  -moz-border-radius arguments
+  border-radius arguments
+
+a.button
+  border-radius 5px
+
+fonts = helvetica, arial, sans-serif
+
+body {
+  padding: 50px;
+  font: 14px/1.4 fonts;
+}