Enumerate the components in the codimension

This implementation is O(2^d). Given that an optimal
algorithm is O(binomial(n over k)) and how small d usually
is, that is feasible.
Toggle capabilities: Yasp now has all entities.
Give the YaspGeometry a bitset with the unity vectors spanning the geometry

AcisAlignedCubeGeometry asks for such bitset, Yasp has such bitsets.
Remove assertions and exceptions related to entities now implemented.
Small fixes on the entity