Lightning Tweaks

• Adding entities to the height map is now split between players and non-players to avoid adding unused entries.
• "gold" and "iron" are now added to the default whitelist, mainly for things like iron and gold horse armor which cannot be crafted.
• Lightning no longer fails to spawn in the rare situation that there are no blocks within the specified radius (i.e. a void) and the player multiplier is 0.
• Loading and refreshing the config is now faster.
• Loading stages now call a generic method that records the time spent for the operation.
• Logged messages that signal the end of an operation now have an elapsed time attached.
• MCP Mappings have been updated to snapshot-20180814.
• Minecraft Forge has been updated to 14.23.5.2838.
• Most of the searching log messages has been changed.
• The BlockPos spam in the console has been fixed.
• The list of metallic items is now generated recursively, based on the ingredients. A maximum level of recursion can be specified in the config under "Metallic Items Options" with a default of 3.
• The logger has been replaced with one specifically for mods. It looks nicer, be less obtrusive, work on servers, and run faster (probably). The mod boots faster since it will no longer need a pre-init stage.
• The searcher class is now called as an instance rather than statically.

IN BETA UNTIL TESTING IS DONE. THIS MAY NOT EVEN LAUNCH IN A COMPILED ENVIRONMENT. Works with Sky Factory 4 so far.