Add suspending capability for the minecraft server through the control
script and an additional screen session which listens on the same port
with netcat.
* Update .conf accordingly
* IDLE_SERVER can be either true or false
* The default is no idle server
* Choose an available netcat flavor automatically
Variable renaming in .install.
Notify the user of kept directories on post_remove and alter ownership
to root before removing the game user.
Print error messages to stderr.
Restore backups easily with the delivered bash script
Human readable naming schema for backups
Backed up directories are now relative
Group has write permission (g+ws) to SERVER_ROOT
Proper quotation of variables which might contain spaces
