Removed the Wither-spawn blocking feature.
Moved entity spawning listener to a separate listener, for now.
Updated config to v7 to reflect this change.
Added an option to replace grass with dirt, and changed the WorldConfig
accordingly.
Updated version to 5.8.5
Fixed NPE error when in lightweight mode.
Fixed block-per-block enabled field not read in config.
Removed useless replace-all-TNT-blocks field.
Updated config to use a blacklist and a whitelist to replace blocks.
Updated example files to reflect the config changes.
Fixed world reloading bug.