[UPDATE] gulpfile

- fix minor date bug
[FEATURE] asset

- add asset module for XHR loading and localStorage caching of assets
Merge branch 'feature/asset' into development
[FEATURE] cdnjs autoupdate

- add cdnjs autoupdate settings to package.json
Merge branch 'feature/cdnjs-autoupdate' into development
[UPDATE] build 3.6.0
Merge branch 'release/3.6.0'
Merge tag '3.6.0' into development

3.6.0