[Numpy-discussion] Deprecate matrices in 1.15 and remove in 1.17?

[Marten van Kerkwijk]

Moving to a subpackage may indeed make more sense, though it might not
help as much with getting rid of the hacks inside other parts of numpy
to keep matrix working. In that respect it seems a bit different at
least from weave.

Then again, independently of whether we remove or release a separate
package, it is probably best to start by moving all tests involving
matrix to matrixlib/tests, so we can at least get a sense of what
hacks are actually present.

-- Marten