Removed system upgrade being forced for safety.  Painful, but it can break working installs.

# REMOVED above upgrade line - this is a bad idea because now we don;t know what versions people have installed
# HOWEVER - leaving this line currently breaks working installations, and we can;t have that.
# FUTURE - I think we may have to go the source-installation route for production stability.  Depending on untested
# packages is great for bleeding-edge but isn't going to cut it for serious consideration as a stable build.