TNTRun 2.3.3

Improvements to the anti afk system and some bug fixes

Notice that the old anti_afk_threshold setting is now called anti_afk_threshold_seconds with the default value of 4 seconds. This won't appear in the config automatically.
Added auto respawn
This version contains fixes and small performance improvements
Some improvements
Added multiple arena layers support!
Small improvements and fixes
Fixed random errors in game ending task