Fixups to work with the latest polyproj branch.
Progress on adapting HoTT and categories to latest polyproj branch.
Adapt categories and hit's code to latest polyproj (Private keyword).
- A few places raise universe inconsistencies in Categories still, not sure why.
- Some minor unification problems with apply/eauto discovered as well.
- Some places requiring more instances of Funext, as I expected.
Everything compiles quickly here.
Update submodule
Fix up some transparency issues
Remove an admit
More fixes
More minor changes
Remove more admits, add more work-arounds
Add back a space to minimize diff against master