quell warnings
Content types etc.
Various fixes and improvements.
Merge branch 'newbreach' of github.com:urbit/urbit into newbreach

Conflicts:
	urb/zod/arvo/hoon.hoon
newbreach back in sync.
new 'nu' for crub
Merge remote-tracking branch 'urbit/newbreach' into crub

acquire creators
fix names