Farmbots! Adds new file farmbot.dm

A new type of buildable AI bot that assists in hydroponics
Waters plants, hoes weeds and uses fertilizers
Merge branch 'master' of https://github.com/Baystation12/Baystation12
Merge branch 'master' of https://github.com/Baystation12/Baystation12
Fixes closets and destructive analyzer

You can no longer load your robot modules into these. Fixes #2138
This belongs in bleeding edge, not master!
Merge pull request #2140 from GauHelldragon/master

Secure Closet Fix