Add jquery-mousewheel v3.1.11.

assets/vendor/jquery-mousewheel/bower.json

@@ -0,0 +1,16 @@
+{
+  "name": "jquery-mousewheel",
+  "version": "3.1.11",
+  "main": "./jquery.mousewheel.js",
+  "ignore": [
+    "*.json",
+    "*.markdown",
+    "*.txt",
+    ".*",
+    "Gruntfile.js",
+    "test"
+  ],
+  "dependencies": {
+    "jquery": ">=1.2.2"
+  }
+}