Apart from returning const T instead of T it kinda worked, but in case
of floating-point vectors it tried to operate with
`std::pair<std::size_t, const T>` internally and failed miserably.
Because it somewhat confusingly may have implied that it's really
composed of 8-bit bools, and not bits. The same reasoning was used to
pick the name for Corrade's Containers::BitArray.
Backwards compatibility aliases are in place as usual, however the
internal BoolVectorConverter is now BitVectorConverter and there
unfortunately cannot be any backwards compatibility. This breaks only
GLM and Eigen integration in the magnum-integration repo, which I'm
fixing immediately. I don't expect any user code to use this internal
helper. For regular vectors maybe, for this one definitely not.
It has the size of three pointers, which is more than a little.
Unfortunately doing just that causes infinite recursion, so be a little
more specific when delegating from the overloads.