Implement getDataPath() and getArenaPath() in SkyWarsPlugin
Redo world copying to use a protobuf cache (not sure if this is or isn't a good idea)
Remove unused import
Add hook to use WorldEdit for arena placing when available.
Merge branch 'develop' into arena-caching
Relocate all libraries into net.daboross.bukkitdev.skywars.libraries, I didn't realize I wasn't doing this before.

Also, update a few libraries to their release versions
Start using proguard to minimize the output jar, for not including all of the unused protobuf libs