Added convenience controls for FCGI processes (especially when managed remotely): spinner, spawner, and reaper. They reside in script/process. More details can be had by calling them with -h/--help

git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@1909 5ecf4fe2-1ee6-0310-87b1-e25e094e27de