Replace thread-unsafe object pools with thread-safe object pools

[collinsmith]

63c17b0 added com.riiablo.util.Pool thread safe object pool implementation. It's worth it to go over com.badlogic.gdx.utils.Pool references and find usages that would benefit from a thread safe object pool. While not necessarily an outright bug, some implementations may produce errors if the throughput is high enough (this only occurred when doing an excessive amount of logging ops/sec), so I'm marking this as such to indicate that is important to look at for packages like com.riiablo.io, com.riiablo.mpq, com.riiablo.codec (all packages that may be hit a ton by multiple threads).