Some backwards compatibility

Updated Output Expression - Thanks edk
Temporarily reverted moving the ping pattern to the mark2.properties
file
Fixed typo in the mark2,.default.properties file
Allow users to specify java path and server arguments
Fixed server arguments
Fixes: Alert plugin fallback functionality, Commandline arguments fix.

Fix alert plugin bug if statplayercount isnt available
- If statplayercount isn't available, reverts to the old functionality
of having alerts appear at the specified interval, if it IS, then it
checks if the current player count is more than or equal to the minimum
player count.
Split server command line arguments
- mark2.service.process.server-args=nogui;--world
worldname;--max-players 64
Properly split arguments
Reduce redundancy
Merge pull request #135 from gsand/master

Some backwards compatibility