Trac #32369: Rewrite Clifford and exterior algebras to have a basis i…

…ndexed by integers

Integers are a more compact way of representing subsets with their bits.
This should both decrease the memory usage to store elements and the
speed due to using bit operations and nearly trivial hashing.

URL: https://trac.sagemath.org/32369
Reported by: tscrim
Ticket author(s): Trevor K. Karn
Reviewer(s): Travis Scrimshaw