CombinatorialPolyhedron: Cache is_simple, is_simplicial

[kliem]

CC: @tscrim @yuan-zhou

Component: geometry

Author: Jonathan Kliem

Branch/Commit: d64cf60

Reviewer: Travis Scrimshaw

Issue created by migration from https://trac.sagemath.org/ticket/33644

[kliem]

Branch: public/33644

[kliem]

Commit: d64cf60

[kliem]

New commits:

d64cf60

cache is_simple and is_simplicial for CombinatorialPolyhedron

[tscrim]

comment:2

LGTM.

[tscrim]

Reviewer: Travis Scrimshaw

[kliem]

comment:3

Thank you.

[vbraun]

Changed branch from public/33644 to d64cf60