feat(template): remove `amsf` option, add `clean_homepage` and `credits` options

BREAKING CHANGE: Please note that templates should be updated for new options
Merge branch 'master' of github.com:avoscloud/open

# By Hong Jiang
# Via Hong Jiang
* 'master' of github.com:avoscloud/open:
  Actually add the article.
  Added the reference article for copywriting guide.