Add the codelab-about section to html template.
Add the codelab-about section to html template.

Qwiklabs/codelab-tools,googlecodelabs/tools,googlecodelabs/tools,Qwiklabs/codelab-tools,googlecodelabs/tools,Qwiklabs/codelab-tools,Qwiklabs/codelab-tools,googlecodelabs/tools