Reformate some scripts and added stop_now script which is not checking if some players are online
Add *.jar to git ignore

TODO: Add server generated files and folders to .gitignore
Add dynamic message server processing and output to specialised files in /dev/shm/server-mc-

Removing online script, because with introduced feature is obsolete.
Status script is now only checking file /dev/shm/server-mc-_/status.
Stop script is using /dev/shm/server-mc-_/players instead of obsolete online script.