Move i18n scripts under scripts/ (#4044)

* Move i18n scripts under scripts/

appengine/.gcloudignore

@@ -8,14 +8,14 @@
 /static/demos/plane/soy/*.jar
 /static/demos/plane/xlf/
 /static/externs/
-/static/i18n/
 /static/msg/json/
 /static/node_modules/
 /static/package/
-/static/theme_scripts/
+/static/scripts/
 /static/typings/
 
 /static/build.py
+/static/eslintrc.json
 /static/gulpfile.js
 /static/jsconfig.json
 /static/LICENSE