Update docs, bundle files, remove lib,

Author: shentao

bower.json

@@ -1,7 +1,10 @@
 {
   "name": "vue-multiselect",
   "description": "Multiselect component for vue.js",
-  "main": "./dist/vue-multiselect.min.js",
+  "main": [
+    "./dist/vue-multiselect.min.js",
+    "./dist/vue-multiselect.min.css",
+  ],
   "authors": [
     "Damian Dulisz <damian.dulisz@gmail.com>"
   ],