Template Package Configs
Concept of Template Package
Template Package is an archive of the template files under a site folder.
If the author update the template files, then the sites whose template package inherit from it will be updated too.
template/readme.txt can help a template package to descript itself.
A simple demo of readme.txt：
key: farbox-template title: My Template Name domain: http://mysite.com this is description
key must be declared, other fields are decided by the designer of template. But you should know, the information of readme.txt is public to other people.
When readme.txt is changed, package system will compute a template_key by
account_uid+key as a unique identifier for the template package.