update readme

Author: iurimatias

README.md

@@ -491,11 +491,13 @@ Embark is quite flexible and you can configure you're own directory structure us
   "contracts": ["app/contracts/**"],
   "app": {
     "css/app.css": ["app/css/**"],
+    "images/": ["app/images/**"],
     "js/app.js": ["embark.js", "app/js/**"],
     "index.html": "app/index.html"
   },
   "buildDir": "dist/",
-  "config": "config/"
+  "config": "config/",
+  "plugins": {}
 }
 ```
 

docs/structuring-application.rst

@@ -11,9 +11,12 @@ structure using ``embark.json``
       "contracts": ["app/contracts/**"],
       "app": {
         "css/app.css": ["app/css/**"],
+        "images/": ["app/images/**"],
         "js/app.js": ["embark.js", "app/js/**"],
         "index.html": "app/index.html"
       },
       "buildDir": "dist/",
-      "config": "config/"
+      "config": "config/",
+      "plugins": {}
     }
+