Specify the Ubuntu version has to be recent LTS
Add some commented code used for setting up vmfest
Correct networking options in node-spec
Setup a user and group for the minecraft server
Setup two FIFO's for communicating with the server
Fixup to setup user group
FIxup to setup fifo's
Switch to only one FIFO for input to server
Install an upstart service script for minecraft
Actually start the service
Replace literal strings with Var references

There were three different usages of the string minecraft, made a Var
for each since they're actually totally separate purposes and could vary
independently.