added asset support and minor bug fix

Author: Aamod Pisat

docs-config.json

@@ -9,7 +9,7 @@
     "include": [
       "src/core/contentstack.js",
       "src/core/stack.js",
-      "src/core/modules/asset.js"
+      "src/core/modules/asset.js",
       "src/core/modules/entry.js",
       "src/core/modules/query.js",
       "src/core/modules/result.js"