Description of problem:
The site name that appears in the index.html file in the root of a Publican-generated website contains <title>Documentation</title> in its head, and <h1>Documentation</h1> in its body. 

These values are picked up by search engines indexing the site, so it would be helpful if this value could be customized to include an organization or product name; for example "Red Hat Documentation". 

Customizing this value would also help people building websites with a default language other than English, since they could choose a title and h1 that reflect the default language.

Maybe this could be set with a parameter in the homepage.cfg file and an option in the create_site action?

Version-Release number of selected component (if applicable):
2.1

How reproducible:
100%

Steps to Reproduce:
1. create a publican website with publican create_site
2. open the index.html file in an editor. 
  
Actual results:
<title> and <h1> say "Documentation"

Expected results:
<title> and <h1> are configurable.

Additional info:
The workaround is to manually edit the index.html file, but you need to re-do this every time that the site is refreshed, because index.html gets overwritten.