[Numpy-discussion] Deprecating matrices.

[Marten van Kerkwijk]

Hi All,

It seems there are two steps that can be taken now and are needed no
matter what:

1. Add numpy documentation describing the preferred way to handle
matrices, extolling the virtues of @, and move np.matrix documentation
to a deprecated section

2. Start on a new `sparse` class that is based on regular arrays (and
uses `__array_func__` instead of prepare/wrap?).

All the best,

Marten