Developing matrix/unmatrix (was Re: RFC 91 (v1) Builtin: partition)

[Nathan Wiger]

> Still, your matrix/unmatrix idea is intruiging... I'd be interested to see
> this fleshed out further (particularly to n-dimensional tensors, which is
> where I find generic functions hard to specify)...

What the heck! I'll try to produce something on it this weekend. By
Monday for sure.

If anyone has any pre-input, please send it to me privately. Thanks.

-Nate