Added nl2br filter

lib/util/middlewares.js

@@ -54,6 +54,11 @@ exports.swigFilters = function(app, swig) {
       return swigFilters.date(input, format, app.get('tzoffset'));
     });
 
+    swig.setFilter('nl2br', function(string) {
+      return string
+        .replace(/\n/g, '<br>');
+    });
+
     swig.setFilter('presentation', function(string) {
       // 手抜き
       return string