Rename core plugin build (to prep for sub-plugins)
Wait to kill entites until a later tick. Addressing #94
Spit out debug info when a URL query fails, to help with #95
Some stupid import rearrangement.

Don't want to throw it out, but trying to relegate it to a single commit
Joining a match needs to be on the synchronous server tick loop

Since conversations are created and run by the chat events, I suspect
that conversation code is executed asynchronously. This means that any
code that is not threadsafe executed within a conversation prompt can
cause CMEs. Threw it on the sync server tick loop to try to help.
ar version returns only 8 digits of the md5 hash
Spectators should have access to teleportation and viewinventory
Only apply respawn rules when a match is in progress.
Players moved to the lobby world should be put in creative.
Cancel click events on foreign (copy, vi) inventories. Addresses #91
Specify an inventory holder on copy inventories. Addresses #91
Rename namespace: org.mctourney.AutoReferee -> org.mctourney.autoreferee

Namespaces are typically lowercase.