we now require Devel::StackTrace, used instead of Carp+IO::Capture::Stderr
strack traces reimplemented to use Devel::StackTrace instead of IO::Capture::Stderr, so that we do not need to tie STDERR just to get a stack trace
BackEnd now provides a start_redis_server() method and now has the ability to log STDERR to redis, where the server will output it to a file in a single process; redis instances are now created fresh per process