### Fix image config
`config`

> image config index name is incorrect.

https setting can be set at anytime. no need in config. And it could be dynamic value.

---
### Library and Helper update
`helper` `comment` `library`

> Add comment into library and helper, and did some change for library and helper

 -  Library
     -  fix https access problem,
     -  update asset html output API function name
     -  add comment for each function
 -  Helper
     -  add comment for each function

---