update scripts

Author: ecarriou

src/system/README.md

@@ -3,8 +3,8 @@
 System Runtime has got a customizable system. You can update all its components, models or behaviors to follow your needs. To do so:
 
 * open a version of [System Designer](https://designfirst.io/systemdesigner/),
-* import the system,
-* edit the system,
+* import the core system,
+* edit the core system,
 * export it,
 * save it in the same place and
 * run `npm run build`.

tasks/watch.json

@@ -1,7 +1,6 @@
 {
   "scripts": {
     "files": [
-      "addons/*.json",
       "src/*.js",
       "src/system/system-runtime.json"
     ],