* Hopefully fixes Cleaning
* Cleaning off window blood is now handled by the Window itself
* Cleanbots now have an advanced mop built into them, I am hoping in the future we can make cleanbots have their mops taken off, but I'm not good at spriting so it isn't a thing yet.
* Adds a pre_clean_callback to replace the should_clean arg (mostly)
* Removes the atom cleaning proc, replaces it with a signal for afterattack on a cleaning tool.
* Fixes and improvements
* adds a new define that allows pre_clean_callback to cancel cleaning entirely, used for mops to check for being wet or attacking buckets and such.
* Fixes cleanbots not properly working, removing their mop and just registering for a signal that bots send instead.
* Changes cleaner component to take proximity into account, that way we don't have to check it on each item's individual afterattacks, that way we don't have to call parent at the end either.
* Improves check_allowed_items a little bit because I hated how it was used for soap.
* Update cleaner.dm
* reviews
Loosely adapted from /vg/. This is an entity component system for adding behaviours to datums when inheritance doesn't quite cut it. By using signals and events instead of direct inheritance, you can inject behaviours without hacky overloads. It requires a different method of thinking, but is not hard to use correctly. If a behaviour can have application across more than one thing. Make it generic, make it a component. Atom/mob/obj event? Give it a signal, and forward it's arguments with a SendSignal() call. Now every component that want's to can also know about this happening.
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