Update config.js

I have to use "/src" instead of "src" to make it work for me. I'm using systemjs 0.18.16

Author: louislarry

jspm/config.js

@@ -9,7 +9,7 @@ System.config({
     "npm:*": "jspm_packages/npm/*"
   },
   "packages": {
-    "src": {
+    "/src": {
       "defaultExtension": "ts"
     }
   }