Many of the options rb-site install presented were advanced options that

a new admin likely didn't need to deal with. For example, the static and

media URLs, web server, Python loader, and the option for file-based

caching.
In order to simplify the first-time install experience, these wizard

pages have been hidden behind an --advanced flag, leaving only the

options that most users will need to deal with.
We also don't want to support mod_python anymore, so this has been

removed entirely.
In total, this takes us from 13 wizard pages to 8.

Tested the wizard in both modes. Verified that in the simple mode, the correct

values got written out and correct files were generated.