Rename RT_EMAIL variable to SUPPORT_EMAIL
Do not just test for the existence of the ANONYMOUS_PUBLICATION_OPTION,
also require it to evaluate to true.
Improve layout of named proxies landing page.
Move all site-specific configuration out of the environment files
to a dedicated set of configuration files.

Tapestry ships with a new file

  config/config.defaults.yml

The values in this file are intended to be overridden in a site-specific

  config/config.yml

file.

This closes #1631