Added 'type="text/css"' to the style tags generated by filters.

lib/filters.js

@@ -22,7 +22,7 @@ module.exports = {
   sass: function(str){
     str = str.replace(/\\n/g, '\n');
     var sass = require('sass').render(str).replace(/\n/g, '\\n');
-    return '<style>' + sass + '</style>'; 
+    return '<style type="text/css">' + sass + '</style>'; 
   },
 
   /**
@@ -37,19 +37,19 @@ module.exports = {
       if (err) throw err;
       ret = css.replace(/\n/g, '\\n');
     });
-    return '<style>' + ret + '</style>'; 
+    return '<style type="text/css">' + ret + '</style>'; 
   },
 
   /**
-   * Transform sass to css, wrapped in style tags.
+   * Transform less to css, wrapped in style tags.
    */
 
   less: function(str){
     var ret;
     str = str.replace(/\\n/g, '\n');
     require('less').render(str, function(err, css){
       if (err) throw err;
-      ret = '<style>' + css.replace(/\n/g, '\\n') + '</style>';  
+      ret = '<style type="text/css">' + css.replace(/\n/g, '\\n') + '</style>';  
     });
     return ret;
   },
@@ -89,4 +89,4 @@ module.exports = {
     var js = require('coffee-script').compile(str).replace(/\n/g, '\\n');
     return '<script type="text/javascript">\\n' + js + '</script>';
   }
-};
+};