Fix bugs in the mining plugin.
Add the new utils plugin, change entity spawning and the lookup command plugins to use it.
Update lookup command plugin.xml.
Remove incomplete item spawning file.
Improve the toString result in Position.
Update existing plugins to use the new utils plugin.
Improve sector-related code.
Improve existing verification handlers and add PlayerActionVerificationHandler.
Order messages alphabetically.
Fix sector repository and make minor improvement to WalkingQueue.
Make specific action-related methods final.