PvP Practice Bots

Added a complete machine learning bot system:
Spawn a machine learning bot with the /mlspawn command; it will save its learned data to a larger "brain" to which all ML bots pull from. The more you fight it, the better it gets.
If you don't want to deal with training on yourself, run /mltrain; this will spawn tons of duo fights where all the bots are learning from each other. Then run /mltoggle to toggle the learned data to the preset bots so they can then use the larger "brain," but they won't add to it to save performance.

Added commands:
/mldata
/mlreset
/mlstats
/mltoggle
/mltrain

It's still a WIP with more complex bots like Crystal and Mace, but ones like Sword/Axe/UHC, you can clearly tell the difference after enough training.

I'm still working on adding support to Blurry's custom shields, but as of this update, the custom shield like bf:shield is not supported.