Allow AutoReferee signs to be broken as normal.
Global world spawn should be a PointRegion, not Location
Add cached players for stats purposes.

Fixes stats for elimination gamemodes.
Save and load no-craft restrictions from autoreferee.xml
Do not compare locations in different worlds.

AutoRefPlayers may have moved to another world. Do not
compare these players. It might be worthwhile designing
a good system for deciding when to remove a player from
a team.
Color objectives internally, rather than using helper methods.
Better tools for lobby servers. `/joinmatch` and match announcement.
Fix elimination gamemodes. Closes #69 for good
A first attempt at removing the power of spectators
Attempt to intercept command block `/say` commands.

Requires SportBukkit or CraftBukkit#999 (addressing BUKKIT-3165)
Adjust y by +0.5 to account for half slabs in .getRandomLocation()