NNP Fluidlogging

Fixed crash on dedicated servers. Transitioned to a (minor) abuse of AuxiliaryLightManager, which seems to have resolved lighting issues on server (re)start. Let me know if there are any lingering lighting issues.

Improved logging of flowing fluids (blocks are no longer deleted; fluids can now flow into and between logged blocks) when enabled in config. However, the issue with delayed visual updates has proven difficult to resolve. For now, you can return to menu and reopen the world if you want to see the correct light levels; just placing a block anywhere in the chunk is enough to see the correct fluids. Remember - this is a low priority, WIP, feature. Feel free to submit bugs, but don't expect a quick turn around.