Add support for multiple view folders

lib/engine.js

@@ -73,17 +73,35 @@ exports.create = function (type, config) {
                 if (path.extname(name) !== options.ext) {
                     f += options.ext;
                 }
-                // Fixme: handle multiple directories.
-                var candidate = path.resolve(options.views, f);
-                fs.stat(candidate, function (err, stat) {
-                    if (err) {
-                        return cb(err);
-                    }
 
-                    read(err, candidate, name);
+                locate(options.views, function(err, candidate, name) {
+                  if (err) {
+                      return cb(err);
+                  }
+
+                  read(err, candidate, name);
                 });
             }
 
+            // Look in all view directories
+            function locate(views, callback) {
+              if(!Array.isArray(views)) {
+                views = [views];
+              }
+              var candidate = path.resolve(views[0], f);
+              fs.stat(candidate, function (err, stat) {
+                  if (err) {
+                      if (views.length > 0) {
+                          return locate(views.slice(1), callback);
+                      } else {
+                          return callback(err);
+                      }
+                  }
+
+                  return callback(err, candidate, name);
+              });
+            }
+
             function read(err, file, name) {
                 if (err) {
                     return cb(err);