Fixed a bug in the /back command
Added /tps command
Added /plugins console command
Added /list command
Rewrite difficulty system
Performance improvements
Better /tps system
Added global tps
Added table sort to /plugins and /list
Updated console list command
Removed senseless code
Simplified OOnSpawningEntity
Merge pull request #81 from mc-server/Difficulty

Rewrite difficulty system
Merge pull request #79 from Howaner/Fixes

Changes.