fix redis startup + logfile location

[grosser]

glueoutputbuf just blows up and logfile now needs to be "" to be stdout

@quirkey

[grosser]

added:

• use minitest
• use simpler exit hook
• fix exit hook not killing redis because it is named redis-server *:9763

[grosser]

@quirkey please have a look here too :)

[grosser]

rebased

[quirkey]

Thanks! Appreciate it.