remove old file
fix typo in comment
remove unneeded file
explain what this app is
don't need no stinking' tests
update domain name key

used to be gleaned from the domain name request but
passenger standalone strips that and all we get is
127.0.0.1 -- so we have to create a global variable that is
set by each artist environment.rb file in their separate dir
remove old confusing comments
delete old code from show controller